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Pyukumuku (ナマコブシ Namakobushi) is a fictional creature from the Pokémon franchise.
Pyukumuku is a Water-type Pokémon that debuted in Generation VII, and is categorized within the Pokédex at #771 as the "Sea Cucumber Pokémon". While it doesn't learn a single offensive move, it learns many status and counter moves, including Counter. Whenever Pyukumuku uses a move in the games, it uses its hand-like organ to attack.
Its ability to be picked up and thrown at opponents in Smash references a part-time job in Alola's Hano Beach, which involves throwing Pyukumuku back to the ocean due to their tendency to stay in a favored spot, even if it means starving, making them unpopular among tourists.
Its attack resembles Counter.
Pyukumuku makes its debut as a Poké Ball summon. When opponents draw close or attack it, it will counterattack with its hand-like organ. This can also be performed by stepping on its back. The player who summoned Pyukumuku can pick it up and throw it like a regular item, and it will shoot out its "hand" when thrown at opponents; it cannot be reflected, and if it's thrown off-screen, it will not respawn. If the summoner jumps on Pyukumuku, it will punch and the player bounces a little. This doesn't happen if the player is helpless or uses an attack. Holding the control stick upwards upon landing on Pyukumuku will have the player bounce higher. It waves "goodbye" before it leaves.