Puftup

Puftups are blowfish enemies that first appeared in the game Donkey Kong Country 2: Diddy's Kong Quest. They have made various appearances since. Puftup's name comes from the fact that it is "Puffed-up".

Donkey Kong Country
Puftups do not appear in-game, however hacking shows unused sprites for Puftup, which were carried over to Donkey Kong Country 2. It is unknown why they were removed.

Donkey Kong Country 2
Puftups appear as semi-common underwater enemies of the "Submerged Seadogs" class in Donkey Kong Country 2. Their main attack pattern was to either inflate largely, posing as obstacles, or inflate and quickly explode, sending spikes in various directions. As with most underwater foes, Enguarde's bill stab will make quick work of it, though Enguarde himself is vulnerable to the Puftup's spikes.

Donkey Kong Land 2
Puftups return in Donkey Kong Land 2, a semi-sequel to Donkey Kong Country 2. As such, there are no major changes aside from not being able to puff up and explode, likely due to hardware limitations.

Donkey Kong 64
Donkey Kong 64 marked their next appearance after an absence from Donkey Kong Country 3. Puftups in this game are purple, but if approached by a Kong they will explode, as if an underwater mine. Also, the boss of the area, Gloomy Galleon, is a giant Puftup named Puftoss.

Banjo-Tooie
In the game Banjo-Tooie the puftups were recycled as Swellbellies. This enemy is almost identical to the Donkey Kong 64 Puftups, except for their red coloring. These pufferfishes are found in Atlantis, Smuggler's Cavern, and Seabottom in Jolly Roger's Lagoon. They can be defeated using the Talon Torpedo learned in Jolly Roger's Lagoon or shooting a grenade egg at them.

DK Jungle Climber
Puftups make their final appearance after eight years of absence in DK Jungle Climber. Using the charge attack when they're deflated will defeat them.