Schluppuck

Ruby: Virtually all of GULPIN’s body is its stomach. As a result, it can swallow something its own size. This POKéMON’s stomach contains a special fluid that digests anything.

Sapphire: Most of GULPIN’s body is made up of its stomach - its heart and brain are very small in comparison. This POKéMON’s stomach contains special enzymes that dissolve anything.

Emerald: This POKéMON’s stomach fluid can even digest scrap iron. In one gulp, it can swallow something that is as large as itself.

FireRed +2: There is nothing its stomach can’t digest. While it is digesting, vile, overpowering gases are expelled.

Diamond +6: Almost all its body is its stomach. Its harsh digestive juices quickly dissolve anything it swallows.

HeartGold +2: It has a small heart and brain. Its stomach comprises most of its body, with enzymes to dissolve anything.

Omega Ruby: Virtually all of Gulpin’s body is its stomach. As a result, it can swallow something its own size. This Pokémon’s stomach contains a special fluid that digests anything.

Alpha Sapphire: Most of Gulpin’s body is made up of its stomach—its heart and brain are very small in comparison. This Pokémon’s stomach contains special enzymes that dissolve anything.