Hoo's Wood 2-6
From the Super Mario Wiki
The level starts with the player needing to spin a platform, using the to reach the top of the level, whilst avoiding thorn branches. After this is a small area where a Perry Block will tell the player how to defeat Hoo, and a Warp Pipe to the boss area.
Hoo attacks by throwing out three eggs which hatch into small owls and swooping down at the player. The player needs to jump on Hoo when it swoops down to deal damage to it. After the third hit, Hoo uses the Joy vibe and send out various eggs which destroy the bridge where the fight is taking place. In this next phase, the player needs to use the Joy vibe and drop onto Hoo two more times to defeat it.