Pokémon is a franchise consisting of video games, anime and other media owned by Nintendo and created by Satoshi Tajiri. Since 1996 it has become the second most successful video game franchise in the world. The anime series, not sharing the canon with the video games, was first broadcast in 1997 and as of February 2014 has made over 820 episodes, spawning 16 movies and counting.
The anime follows Ash Ketchum, a young boy destined to become a Pokémon Master, his group of fellow Pokémon trainers that differs every season, and usually his nemeses Jessie, James and their talking Meowth, three members of Team Rocket determined to steal every Pokémon they find.
Clefairy And The Moon Stone (S01E06)
Misty's Staryu performs a Water Gun attack into Meowth's mouth, ballooning him up and sending him flying away.
The Battling Eevee Brothers (S01E40)
Team Rocket steals everything important to the party, including the Pokémon, the stones and the food. After they do, Meowth and James appear full.
The Song of Jigglypuff (S01E45)
Misty gives a balloon to Jigglypuff to make its lungs stronger for singing, but this doesn't work.
Meowth Rules! (S02E15)
Meowth is served food by islanders who are worshipping him.
Power Play! (S04E14)
Everyone in the gang appears full from having a meal at a Pokémon Center except Ash, who is still gorging himself with hamburgers.
Imitation Confrontation (S04E17)
Mini-Dit, Duplica's other Ditto, takes on the form of Ash's Totodile and tries to perform a Hydro Pump attack, but ends up just breathing air because Totodile doesn't know that move.
Fly Me to the Moon (S05E02)
All the Pidgey that live on Pudgy Pidgey Isle (minus the one named Orville) have grown fat because there are no predators, also making them unable to fly.
A flashback shows that the Pidgey are born small, but grow large from eating so much.
Dueling Heroes (S05E07)
Ash's Totodile wins the fight against Christopher's Kingdra by biting its snout, causing all the water to hold back in its belly and sending it shooting up into the air paralyzed.
In the match between Misty and Harrison, Harrison tells his Qwilfish to swallow water before using a Pin Missile attack.
The Lotad Lowdown (S06E12)
A girl named Natalie makes Brock a lot of pie.
Exploud and Clear (S07E66)
Ash's Pokémon gorge themselves near the beginning of the episode.
Choose It or Lose It! (S08E37)
Team Rocket get themselves a job as snack sellers and as a reward are given an all-you-can-eat buffet. They finish it all with very full stomachs.
Thinning the Hoard! (S09E36)
When May battles Harley in the Grand Festival, Harley's Wigglytuff uses its rubbery body to give May's Pokémon a hard time.
Glory Blaze! (S10E50)
While fighting Ash and Paul, a blackbelt commands his Zangoose to use Fire Blast. It gains a significant belly before shooting fire.
Throwing the Track Switch! (S11E03)
Pikachu and Ash get their distended bellies massaged by Dawn's Buneary and Brock's Happiny after eating a lot.
A Lean Mean Team Rocket Machine! (S11E40)
Having spent a week working at the Pokémon Summer Academy, Team Rocket seems to be out of shape. However, their stomachs rumble and they stop at an all-you-can eat restaurant, getting even fatter in an instant. They panic and start exercising.
Doc Brock! (S11E42)
While the gang is eating, Team Rocket prepare a large bag of potato chips for themselves, ending up with swollen stomachs afterwards.
If the Scarf Fits, Wear It! (S11E46)
An old acquaintance of the group, Angie, tells them that she would love to have them stay for dinner, but unfortunately she is too occupied with her farm chores. Brock offers to cook instead, and she winds up visibly stuffed after the meal (as do everyone's Pokémon).
An Egg Scramble! (S12E38)
Team Rocket steals the food from the festival, and Jessie ends up with an enlarged belly.
Double-Time Battle Training! (S12E50)
Ash and Pikachu end up stuffed after feasting on sweets.
For the Love of Meowth! (S13E21)
The Glameow that was stolen by Team Rocket and crushed on by Meowth evolves into Purugly, which is noticeably fatter.
The Battle Club and Tepig's Choice! (S14E04)
Ash's Oshawott eats the food meant to draw out a Pokémon at the Battle Club.
Emolga and the New Volt Switch! (S14E25)
Iris's Emolga uses Attract on four of Ash's Pokémon to take all their apples - her belly exposes evidence.
Cilan Versus Trip, Ash Versus Georgia! (S14E40)
Ash appears full after an eating contest with Stephan.
The Mystery of the Missing Cubchoo! (S15E40)
A wild Beartic becomes stuffed after eating a lot of apples.
Beauties Battling for Pride and Prestige! (S16E01)
Ash's Oshawott swipes food from Pignite, who responds with a Flamethrower.
Lost at the League! (S16E08)
While searching for Iris' Axew, Ash's Oshawott eats a boxful of apples meant for a group of wild Trubbish.
Battling on Thin Ice! (S17E06)
Pikachu and Fletchling stuff their faces when Ash is discussing his rematch plan.
An Appetite for Battle! (S17E15)
Clemont's Chespin gains weight from eating macarons at a camp dinner, slowing his attacks down. As Clemont invents something to help him lose weight, the Chespin wanders off to a cottage where an old woman is baking some macarons. The old woman takes care of him by letting him have some of her macarons, and Clemont sees this thinking that his Pokémon does not seem to like him anymore after losing so many battles.
However, the old woman uses Chespin for a Pokémon battle againsts her husband's Delphox in order to get him to apologize. Not until Clemont saves his Chespin does the woman realize that the Chespin is too slow, so she agrees to have Clemont fill in for her, and with his help the Chespin dodges so many attacks that he returns back to his normal shape.
Performing with Fiery Charm! (S18E31)
In Serena's flashback, Pikachu, Chespin, and Dedenne stuff themselves with the Poké Puffs she made.
Adventures in Running Errands! (S18E35)
As a reward for completing the errand, Clemont gives Chespin as much food as it wants. However, Chespin eats too much and becomes sick.
An Explosive Operation! (S19E14)
Ash, Pikachu, and Dedenne are briefly shown stuffed at the beginning of the episode.
Finals Not for the Faint-Hearted! (S19E37)
During the finals of the Kalos League, Ash faces off against Alain. Alain's Charizard inhales deeply before firing Flamethrower at Ash's Greninja.
Battling With a Clean Slate! (S19E44)
Clemont's Chespin stuffs itself again during the party celebrating Alain's return.
First Catch in Alola, Ketchum-style! (S20E04)
Meowth and Wobbuffet become stuffed after eating all the food Bewear offers them.
To Top a Totem! (S20E09)
Pikachu and Rockruff stuff themselves during breakfast.
Racing to a Big Event! (S20E13)
In the second leg of the Pokémon Pancake Race, James has trouble pulling a disguised Meowth and Wobbuffet, claiming they gained weight from Bewear's food.
A Guardian Rematch! (S20E19)
Ash and Pikachu end up being stuffed after eating delicious sweets served by Sophocles' mother.
Hey Mush, Are You Going to Sleep in the Morelull Forest Too? (S20E29)
While camping in the woods, Ash and his friends have their energy drained by Morelull when they fall asleep, resulting in them drastically losing weight. Everyone effected recovers to their original size by eating enough, but Ash deliberately stuffs himself.
Later Ash helps feed Morello by letting it absorb some of his energy as he eats, resulting in the both of them winding up stuffed.