Spinni is one of the Squeaks, and a reoccuring Mid Boss in Kirby: Squeak Squad. He is the fastest of the four lead Squeaks. Spinni usually appears on levels with set paths or levels where Kirby must race to get the large treasure chest. Like Storo, he sometimes appears when Kirby obtains a large chest. As such, his main goal is to steal Kirby's chest and take it to the Squeaks' hideouts. Kirby can either run away with the chest, defeat Spinni, or if Spinni already obtained the chest, Kirby can quickly go to the hideout to defeat him. Spinni's method of attacking is by either hitting Kirby with a claw or shuriken (ninja star), both of which may be inhaled and thrown back at him or swallowed to get either the Animal ability if Spinni drops his claw and Kirby swallows it, or the Ninja ability if Kirby swallows the shuriken when it is thrown at him.
Spinni is a short yellow mouse with a red cape and sunglasses. His main trait is agility and mastery with weapons, able to swim underwater with efficacy. If he is stunned inside the hideout, he will turn red once recovering and get noticeably stronger, becoming resistant to flinching. Spinni also makes an appearance in the sub-game Smash Ride, where he is the main opponent.
In Kirby Star Allies, Spinni appears as part of Daroach's move-set, when he uses the appropriately-named 'Summon Spinni' technique. When called, Spinni runs forward, jumping over gaps, attacking enemies or objects in the way with his claw, and will also turn when running into a wall. He disappears after about five seconds.
- The original Japanese version of Kirby: Squeak Squad has stated that Spinni is female. However, the American version of Kirby: Mass Attack refers to Spinni as a male. 
another artwork of Spinni from Kirby: Squeak Squad