Heaviest Pokemon in the Franchise From All Generations

What is the heaviest Pokemon?

The heaviest is Celesteela, with Cosmoem and Primal Groudon coming in behind at second and third heaviest. Ultra Beast Celesteela carries the weight of an entire ancient literary tradition on its shoulders, while Cosmoem possesses the power of an entire planet (sort of) and Groudon has the power to reshape the land at a moment’s notice, raising and expanding whole continents. It's fair to say the backstories behind these critters are pretty incredible!

Who are the top 10 heaviest Pokemon?

The top 10 heaviest Pokemon of all time are Melmetal, Stakataka, Guzzlord, Mudsdale, Mega Metagross, Groudon, Eternatus, Primal Groudon, Cosmoem and Celesteela. Here are the rest of the Pokemon that weigh the most in the franchise!

 30. Mega Rayquaza (Pokemon Weight: 392.0 kg / 864.2 lbs) 

Heaviest Pokemon in the Franchise
The original Rayquaza, a dual Flying/Dragon type from Generation 3 isn't quite heavy enough to make this list. But upon using the Dragon Ascent move and becoming this mega Dragon/Flying beast, all those extra blades and super shiny gems make it almost 200 kg heavier. As a result it becomes chunkier, cooler, more powerful, continuing to carry the responsibility of keeping Kyogre and Groudon from destroying the world. You can also find Rayquaza on our Best Snake Pokemon list! (Also includes dragons who look like snakes)

 29. Mega Aggron (Pokemon Weight: 395.0 kg / 870.8 lbs) 

Heaviest Pokemon in the Franchise
Known for protecting its land and highly territorial at the best of times, Aggron claims an entire mountain as its territory and is known for mercilessly attacking anything that violates its environment. Sporting an exoskeleton resembling a full plate of armor, this powerful Steel-type takes its name as the “Iron Armor Pokémon” to the next level. It is known to fight Tyranitar over living space, but when it comes to weight, Aggron is the winner by far.

 28. Wailord (Pokemon Weight: 398.0 kg / 877.4 lbs) 

Heaviest Pokemon in the Franchise
Very similar in appearance to a real life whale, it’s only natural that a Pokémon based on this massive mammal would make it into the top 30 heaviest. Known as the Float Whale Pokémon, Wailord is naturally a Water Type and is the largest Pokemon ever to be identified. It's actually light in relation to its size! It swims and travels the seas of the Hoenn region eating huge amounts of smaller Pokémon like Wishiwashi. Like our real life dolphins, packs of Wailord are said to use their giant Zeppelin-like forms to create massive splashes and huge water disturbances that help them herd their prey. The spectacle of a leaping Wailord in the wilds is said to be a magical sight! Although one would also probably need to bring an umbrella!

 27. Steelix (Pokemon Weight: 400.0 kg / 881.8 lbs)

Heaviest Pokemon in the Franchise
Despite it being known as the Iron Snake Pokémon, - pehaps it is instead made of steel? - as iron doesn’t quite look like that! Its name “Steelix” is also a pretty big clue. Plus it is a Steel/Ground-type, with its weight being the consequence of an incredibly dense molecular make-up, a product of living deep underground, compressed by tons of rock and soil. It's said that its body becomes diamond-like after enough time too.

 26. Alolan Exeggutor (Pokemon Weight: 415.6 kg / 916.2 lbs)

Heaviest Pokemon in the Franchise
A dual Grass/Dragon type Pokemon, Alolan Exeggutor appears as like a real life palm tree variation, with its egg faces resembling coconuts. It still looks pretty intimidating and creepy, although I suspect that's partially due to its multiple face situation. It is a classic critter from the times of Pokémon Red & Blue after it got some love with Generation VII’s Alolan varieties. According to the Alolan people, this is the way Exeggutor are supposed to look. If we’re looking at their size and weight, that certainly seems to be the case. 

 25. Regigigas (Pokemon Weight: 420.0 kg / 925.9 lbs)

Heaviest Pokemon in the Franchise
Appearing as like a golem of nature’s powers, with seven black circular eyes and green mossy feet (although looks a little bit like a clown figure with green hair and legwarmers), Regigigas is said to possess the strength to have moved the continents to their current positions and shaped the land. Because of this, we might only expect this giant to be at least a bit on the heavy side. It was introduced in Generation IV as the maker of Hoenn’s Regis (not exactly light themselves) but otherwise remains shrouded in mystery. Despite all the uncertainty, knowing the Colossal Pokémon’s exact weight doesn’t seem to be a problem for the region’s top Pokémon researchers. 

 24. Primal Kyogre (Pokemon Weight: 430.0 kg / 948.0 lbs)

Heaviest Pokemon in the Franchise
It is the primal version of Kyogre that earns it its place on this list, for only once it has returned to its former glory through Primal Reversion and some weight lifting, the Pokémon personification of the sea gets the recognition it deserves for its mad gains. It is an ancient water Pokemon and appears as a whale or shark-like creature, said to be the personification of the sea itself. This Water-type Legendary from Generation III was amazing back in the day, but gains a brand new revamped look in Pokémon Alpha Sapphire. 

23. Heatran (Pokemon Weight: 430.0 kg / 948.0 lbs)

Heaviest Pokemon in the Franchise
This Pokemon looks just like a creature from that old CBBC show Bamzooki *childhood* but apart from that, appears as a four legged, space-rock, alien-like creature who is known as the 'Lava Dome Pokemon'. It is uncommon and hard to find, said to dwell in volcanic caves, and this Fire/Steel-type has a fiery spirit and a body made of molten steel that’s as heavy as it is badass. It can use its cross-shaped feet to dig into the rock of the underground magma tunnels it inhabits to lever its massive body around. Heatran is a regular Pokémon species like any other and not a Legendary Pokemon - apart from its weight and amazing design, that's pretty legendary.

 22. Snorlax (Pokemon Weight: 460.0 kg / 1014.1 lbs)

Heaviest Pokemon in the Franchise
Notoriously big and heavy, this Pokémon has been known for its heavyweight status ever since it was introduced among the original 151. It is said to be so heavy that the only way to remove this Pokemon from the middle of a road when it is taking a nap there is to find and play a Pokéflute to rouse it from its slumber. Known as the Sleeping Pokémon, it is still far from being the heaviest around, despite spending most of its time either eating, resting or digesting. There are Pokémon made of rock and steel in the race, and although super heavy, Snorlax’s soft belly doesn’t quite cut it.

 21. Necrozma (Dusk Mane) (Pokemon Weight: 460.0 kg / 1014.1 lbs)

Heaviest Pokemon in the Franchise
Once it absorbs enough light, Necrozma can undergo a process called Ultra Burst to reclaim its true form: Ultra Necrozma, a colossal dragon of pure light energy. It is essentially a fusion, a Pokémon that has traveled through different dimensions and is made of elements we don’t fully understand. It weighs the most in its Dusk Mane form, acquired by devouring the light of Solgaleo. It is a powerful Psychic/Steel-type with a stylish, sharp-edged exoskeleton, and weighs the same as the added mass of both Solgaleo and Necrozma. 

20. Hoopa Unbound (Pokemon Weight: 490.0 kg / 1080.3 lbs)

Heaviest Pokemon in the Franchise
Even cooler and heavier (and creepier) than Necrozma is the unleashed version of Hoopa, the Mischief Pokémon from Generation VI. It's super colourful and appears as a bull-like creature with an insect-like body, with invisible arms as all its hands can move by themselves (there are six in total!). Perhaps this means its arms won't get all tangled while it is performing different tasks, who knows, but the design for this Pokemon is truly epic! Hoopa Unbound is a dual Psychic/Dark type event-exclusive Pokémon, who's design is perhaps heavily influenced by Hindu deities and middle-eastern legends of the Djinn. Which are essentially magical specters and demons said to possess immense powers they use to both help and hinder humans.

19. Avalugg (Pokemon Weight: 505.0 kg / 1113.3 lbs)

Heaviest Pokemon in the Franchise
As cold as ice but as hard as steel, Avalugg is known as the Iceberg Pokémon and was introduced in Generation VI. It is cleverly designed to look exactly like an iceberg or block of ice and would definitely camoflage well in the wild. Its size is smaller than the others, so must be incredibly densely made to achieve such a massive weight. This Ice-type beast is known to carry many Bergmite on its back, helping out other members of its evolutionary line. Assuming the weight provided by the Pokédex doesn’t include these, then an Avalugg in the wild must be even heavier.

18. Stonjourner (Pokemon Weight: 520.0 kg / 1146.4 lbs)

Heaviest Pokemon in the Franchise
Often thought to be a mobile version of Stonehenge, it definitely looks the part by its appearance! It is crafted solely out of extremely heavy blocks of stone, so we would definitely expect to find this Pokemon in the ranking! Stonjourner, the Big Rock Pokémon, is essentially a walking megalith, known to stand in the grasslands, enjoying the breeze and watching the sun move through the sky most of the time. It's said that once a year many Stonjourner gather and form circles in a mysterious event thought to have held sacred meaning to earlier civilizations of the Pokémon world. 

17. Metagross (Pokemon Weight: 550.0 kg / 1212.5 lbs)

Heaviest Pokemon in the Franchise
A dual-type Steel/Psychic pseudo-legendary Pokémon introduced in Generation III that is specially renowned for its effectiveness in competitive play. Where a Metang is made of two fused Beldum, Metagross is made of two fused Metang. It is made up of the collective consciousness of four individual Beldum, working as one, which means it possesses incredible intelligence and a hefty weight at the same time. 

16. Zygarde (Complete Form) (Pokemon Weight: 610.0 kg / 1344.8 lbs)

Heaviest Pokemon in the Franchise
Possessing 100% of its total cells, Zygarde Complete Forme is said to exceed both Xerneas and Yveltal in power. Zygarde is the Order Pokémon, an organism comprised of many “Zygarde Cells”, which you can collect throughout Alola. Despite being one of the Legendary Pokémon from Generation VI, it’s possible to acquire one in Pokémon Sun & Moon. As you collect them you’ll get to see different states of Zygarde development. Get them all, and you’ll be treated to the massively powerful Complete Forme, which is essentially a Megazord from Power Rangers. I'm still wondering, if it possesses less than 100% of its cells, does that make it a foeteus? 

15. Copperajah (Pokemon Weight: 650.0 kg / 1433.0 lbs)

Heaviest Pokemon in the Franchise
A large, elephantine Pokémon with a dark green body and a light teal underbelly, this metal-plated elephant, known as the Copperderm Pokemon, is an absolute unit of pure chunkiness. It is a Steel-type and the evolved form of the cuter and smaller Cufant, now becoming an unstoppable force with great Attack and insane HP. Its epic Heavy Metal ability actually doubles its weight while in battle - if this was its official weight, it would be the heaviest Pokémon on this list by far, which is insane!

14. Dialga (Pokemon Weight: 683.0 kg / 1505.8 lbs)

Heaviest Pokemon in the Franchise
A dual-type Steel/Dragon Legendary Pokémon introduced in Generation 4 and known as the Temporal Pokémon, Dialga is the Pokémon Arceus created to bear the weight of years and history. It is not known to evolve into or from any other Pokémon and is the game mascot and main Legendary of Pokémon Diamond, appearing on the boxart. Its body seems to be made of some kind of metal and other hardy materials that contribute to its weight and it is said to have the power to control time itself. It is said that time began moving when Dialga was born.

13. Mega Steelix (Pokemon Weight: 740.0 kg / 1631.4 lbs)

Heaviest Pokemon in the Franchise
A little bit of deja vu here as you may have noticed that Steelix is already n.27 in our heavy Pokemon ranking, but the wonders of Mega Evolution give Steelix another moment to shine. The Mega Evolution process gives Mega Steelix a series of glimmering diamond spikes along its body, this transformation increasing its mass considerably. With sharper edges, a cooler design, and an absurdly high Defense stat, this already steely strong and powerful Pokemon, already known to be pretty efficient at digging towards the Earth's core - there are records of this Pokémon reaching a depth of oversix-tenths of a mile underground - gains a whole other level of coolness as a heavyweight.

12. Giratina (Altered Forme) (Pokemon Weight: 750.0 kg / 1653.5 lbs)

Heaviest Pokemon in the Franchise
Despite looking considerably more menacing in its Origin Forme, Giratina’s Altered Forme remains considerably heavier, and is also therefore more dangerous. For a Pokémon as violent as Giratina, every gram is a weapon with which to crush its opponents. It is a dual Ghost/Dragon-type Pokemon, often known as the Renegade Pokémon for its unruly tendencies.

11. Zamazenta (Pokemon Weight: 785.0 kg / 1730.6 lbs)

Heaviest Pokemon in the Franchise
A Fighting-type Legendary Pokémon introduced in Generation 8. While it is not known to evolve into or from any other Pokémon, Zamazenta has a second form activated by giving it a Rusted Shield to hold. Zamazenta is a heroic figure of legend said to have fought alongside a Galarian king to protect the region from an invasion long ago. It’s only natural that it is so heavy, since its position as the shield that guards the realms of people and Pokémon requires it to withstand any and all blows without flinching. 

10. Melmetal (Pokemon Weight: 800.0 kg / 1763.7 lbs)

Heaviest Pokemon in the Franchise
A Pokémon that has come back to life after 3,000 years. In ancient times, it was worshiped for its ability to create metal from anything and is known as the Hex Nut Pokémon. Considering this Pokémon’s body is mostly comprised of mercury, its weight should come as no surprise to anyone familiar with the periodic table. In fact, if you think about the fact that a litre of mercury weighs in at around 1400 kg, this powerful guy should probably weigh much, much more. Perhaps it is hollow on the inside? 

9. Stakataka (Pokemon Weight: 820.0 kg / 1807.8 lbs)

Heaviest Pokemon in the Franchise
Generation VII introduced a different kind of creature called Ultra Beasts, beings from another world that wandered into Alola by accident. Among them, Stakataka is one of the least organic-looking, an Ultra Beast composed of many dark gray, stone lifeforms stacked together to form a four-sided tower with a spindly leg on each corner. Known as the Rampart Pokémon, this mysterious four-legged stack of blocks is actually the combined effort of many smaller life-forms, each of which has a notorious shiny “eye”. This Rock/Steel-type is an absolute tank in combat!

8. Guzzlord (Pokemon Weight: 888.0 kg / 1957.7 lbs)

Heaviest Pokemon in the Franchise
A scary looking Dark/Dragon-type Pokémon introduced in Generation VII. It is one of the Ultra Beasts and is code named UB-05 Glutton, also known as the Junkivore Pokémon. Like most Ultra Beasts, Guzzlord has a design that differs on a fundamental level from that of a normal Pokémon. It looks a little like something you’d find at the end of a dungeon in a Final Fantasy game. It is said to have become this big and heavy thanks to its ability to eat anything it finds, from rusty tools to run-down cars. It's fair to say this Pokemon is always hungry!

7. Mudsdale (Pokemon Weight: 920.0 kg / 2028.3 lbs)

Heaviest Pokemon in the Franchise
A Ground type Pokémon introduced in Generation 7, also known as the Draft Horse Pokémon. Known for its incredibly powerful form and stoic nature, Mudsdale is a sturdy horse that has its own clever and kind of creepy method of covering its legs in an ultra-hard and heavy substance, made by mixing mud with its own saliva. It means it can deal devastating damage to opponents, with its back legs. An extremely heavy Pokemon, Mudsdale are banned from traversing many public roads. 

6. Mega Metagross (Pokemon Weight: 942.9 kg / 2078.7 lbs)

Heaviest Pokemon in the Franchise
This massive beast is the result of one Metagross, one Metang and two Beldum linking up, which gives it the smarts and brawn of eight Beldum working together in perfect unison. It also kind of looks like a massive, ultra powerful crab, which will be sure to scare its opponents in battle. Disturbingly, the Mega Evolution treatment it underwent in Generation 6 also makes Mega Metagross much crueler in battle, and it possesses incredible intelligence. Opponents beware!

5. Groudon (Pokemon Weight: 950.0 kg / 2094.4 kg)

Heaviest Pokemon in the Franchise
A Ground type Pokémon introduced in Generation 3, known as the Continent Pokémon and the main Legendary from Pokémon Ruby. Since it is supposed to have once brought the different landmasses of the world into existence during its battle against Kyogre over control of the forces of nature, it might only be natural that this Pokemon is one of the top five heaviest of all time. It appears as a reptilian, metal plated, lizard-dinosaur creature with huge silver spikes protruding from its body and definitely looks the part!

4. Eternatus (Pokemon Weight: 950.0 kg / 2094.4 lbs)

Heaviest Pokemon in the Franchise
A Poison/Dragon type Pokémon introduced in Generation 8, known as the Gigantic Pokémon and appearing as a gigantic, draconic alien Pokémon, with a vaguely draconic shaped body and a skeletal appearance. It is said to have arrived at the Galar region 20.000 years ago, sealed inside a meteorite of unknown origin. It stands at over 20 meters tall, which is absolutely huge, so naturally possesses a huge body weight to match.

3. Primal Groudon (Pokemon Weight: 999.7 kg / 2204.0 lb)

Heaviest Pokemon in the Franchise
Thanks to the power of Primal Reversion, this dual Ground/Fire type Pokemon is back to its former self and now the Continent Pokémon climbs a couple of spots on the ranking. It’s bigger, angrier and has the power to reshape the land at a moment’s notice, raising and expanding whole continents, causing many earthquakes in its wake. Its weight truly reflects its epic power.

2. Cosmoem (Pokemon Weight: 999.9 kg / 2204.4 lbs)

Heaviest Pokemon in the Franchise
Known as the Protostar Pokémon, Cosmoem holds within it the infinity of the universe. This Psychic-type appears as an adorable looking spiky ball with a cute expression, it's pretty small at only 10 cm tall but this tiny ball of stars is known to accumulate energy, growing heavier and heavier, in order to evolve into either Solgaleo or Lunala. Even though Cosmoem should be joint n.1 as it shares the same weight as Celesteela, it gets second place because it’s only a temporal form and will lose most of its weight once it transitions into its next stage.

Why is Cosmoem so heavy?

Cosmoem is a huge planet in a little cell and when it evolves its massive energy is released creating a legend. It manages to achieve its massive weight by accumulating vast amounts of energy as a temporal form.

1. Celesteela (Pokemon Weight: 999.9 kg/ 2204.4 lbs)

Heaviest Pokemon in the Franchise
Let's take a look at our Ultra Beast Celesteela! Known as the heaviest Pokemon in the Franchise, it appears as a little like a Japanese lady in a traditional kimono as a Space Shuttle like form. But there is a reason for this, this dual Steel/Flying-type is said to be based on the Japanese folk Tale of Princess Kaguya, a girl known to be born on the Moon and sent to Earth inside a bamboo shoot. It is considered to be the oldest Japanese story to be put down in prose, so you could suppose that Celesteela's weight is so great as to carry the weight of an entire ancient literary tradition on its shoulders. If it had shoulders, of course!

Not only does a Pokemon's weight determine the effects of many moves such as Low Kick or Body Slam, but it also gives us a little insight into the lives these Pokémon lead. I hope you enjoyed this Pokemon ranking of the well-fed, the heavily armored, and those who just carry the weight of the world on their shoulders. 

Who is the heaviest Generation 1 Pokemon?

The heaviest Pokemon from Generation 1 is easily Snorlax, with its huge and bulbous form, followed by Golem and Gyarados.

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