Gulpin is a round, green, amorphous Pokémon. It has a black diamond marking on its back and a yellow feather-like adornment on its head. A female has a shorter feather than a male. Its face consists of puckered lips and slanted eyes that are usually closed. It has two stubby appendages that are the same shape as its lips. It swallows anything of its own size whole, since its stomach comprises most of its body. Its heart and brain are very small in comparison to its stomach. The unique stomach acid it has allows it to digest almost anything. When it is digesting, vile, overpowering gases are expelled. It lives in grassy areas.
Multiple Gulpin debuted in Gulpin it Down, where they were eating all of the food in the harbor city Ash and his friends were in. Because of this, Professor Jacuzzi made several efforts to stop them, but one such effort wound up enlarging one of the Gulpin, as well as Ash's Treecko. Both were eventually restored.
A Gulpin appeared as one of the Pokémon living at the Nebel Plateau in Volcanion and the Mechanical Marvel. It was particularly close to the Volcanion guarding Nebel Plateau. Sometime ago, it had been abandoned by a Trainer whose last act before departure was to hug it. As a result, Gulpin came to associate hugging with abandonment, which nearly strained its newly-formed relationship with Ash when he also hugged it. Later, it helped Clemont to break the bonds holding Ash and Volcanion together by using Gastro Acid.
A Trainer's Gulpin appeared in a flashback in Curbing the Crimson Tide!, where it was revealed to be one of the Pokémon defeated by a disguised Scizor known as "Red Lightning".
A Trainer's Gulpin appeared in Securing the Future!, where it joined the rest of Alola in showering Necrozma with light so it could return to its normal form.
Gulpin, the Stomach Pokémon. Gulpin is able to swallow items of its own size whole, as its stomach compresses most of its body. Its unique stomach acid allows it to digest almost anything.
After being released from its Poké Ball, Gulpin will wait until an opponent passes by, then will use Swallow to trap and constantly damage them. The opponent may also be beat on while in Gulpin's mouth for extra damage.
Trophy information
"A Stomach Pokémon. While it's a carefree Pokémon with a lovable face, it can swallow something the size of itself in one gulp. Its stomach is filled with gastric juices strong enough to dissolve anything it eats. As it matures, it learns Wring Out, a move which is as strong as the remaining strength of the Pokémon. It evolves into Swalot."
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.
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.
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.
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.
Gulpin's appearance may be based on a single, giant poison gland or even a gallbladder, the green sac-like organ that stores gastric acid. It also shares similarities with some snake species known to swallow their prey whole.
Name origin
Gulpin is a shortening of gulping (swallowing). It may also be a combination of "gulp" and "sculpin", as its appearance vaguely resembles the related blobfish.
Gokulin may be a combination of ゴクリ gokuri (the sound of gulping) and toxin.