From the Super Mario Wiki
Hoo is the second boss of Super Princess Peach. Hoo is the protector of Hoo's Wood. He attacks by throwing eggs at Princess Peach, which hatch into baby owls. He will then swoop down at Peach, who must jump on his head three times, where Hoo then uses his own Vibe: Joy. Following this, the platform on which the battle is taking place breaks, and both Peach and Hoo fall to the ground, at which point Peach uses her Joy Vibe twice to jump on Hoo and defeat him. Peach must deactivate the Joy Vibe before landing on Hoo, as he himself is capable of using that vibe at that point in the battle and will also shield himself with his wings during the amount of time Peach is using the Joy Vibe.
Names in other languages
||A genus of owls
||Portmanteau of "gufo" (owl) and "boss"