Pukumon

Pukumon is a Mutant Digimon whose name is derived from the onomatopoeia for swelling (ぷくぷく), and whose design is derived from the pufferfish. It is a British Punk Digimon that was born when Britain's strongest hacker caused a mutation in a computer virus in which he had poured all the knowledge he possessed. Although its size is small, it has a rebellious personality that contends for first place even in the Digital World. It can't help picking fights, no matter whether the opponents are stronger or weaker than itself, and settling disputes with fist fights is considered its normal style. Its Metal Head is made from Chrondigizoit.

Digimon Adventure 02: The Road to Armor Evolution
Pukumon encountered Boltmon at Ueno Park on Valentines Day, in the guise of a strange figure with weird hair. He was the one who talked Boltmon into causing the chaos at Ginza in order for all the DigiDestined of Tokyo to be in one place so he could destroy them personally. To increase his chances, he brought a Control Spire with him to hinder any Digivolution, except Armor Digivolution. After a mix-up of D-Terminals, Pukumon was sent running after the beating he took from Saggitarimon, Pteramon, Butterflymon, Manbomon, Rinkmon and Pucchiemon.

Digimon Tamers
A Pukumon was among the Mega Level Digimon that appeared to help the Sovereigns fight the D-Reaper.

Digimon World 2
Pukumon digivolves from Dragomon, MarineDevimon, ShogunGekomon and WaruSeadramon.

Digimon World 3
He apears as a random enemy in magasta military base.

Digimon World Dawn/Dusk
Pukumon digivolves from Scorpiomon and can be found in Macro Sea.

Digimon World Championship
Pukumon Digivolves from Divermon from passing time.

Attacks
 * Needle Squall: Launches its super-hard spines all at once from its Metal Head.
 * Globefish Poison