Pokio

Pokios are hummingbird-like enemies found in Seaside Kingdom, Bowser's Kingdom, Dark Side and Darker Side in Super Mario Odyssey. They wander around and poke Mario with their beaks when he approaches them. To capture them, the player must first knock off the samurai helmet that they wear. Once captured, Mario can poke enemies with his beak. If Mario pokes at a wall, he can cling onto it and fling himself any desired direction; this is useful for climbing up walls. Additionally, with his beak, Mario can flick incoming bombs the opposite direction, which can be used to chuck bombs at destructible blocks. Spinning fast enough makes Pokio perform a spin attack.

These two skills are necessary in the first boss fight against RoboBrood, as Mario (under Pokio form) must flick bombs at the RoboBrood's legs, topple it, and then climb on top of it with his beak to Ground Pound the Broodals in their domes.