Beezley

Beezley (ハッチ, Hacchi) is a bee enemy coming from Wario Land 4 that is also an enemy in the infamous Adventure mode level, Floating Islands.

In Super Smash Flash
Beezleys are one of numerous aerial enemies in Super Smash Flash, alongside Flying Goombas, Buzzers, Mayu Birds and Pearl Birds. They are exclusive to the aforementioned Floating Islands, where they follow the player around where contact with them results in the character taking damage and getting pushed back a bit. They can be taken out with a single hit, as usual for all enemies in the game.