Goblin (ゴブリン,Goburin?), also known as Air Tikki in the Mega Man 2 instruction manual for the U.S., is an indestructible giant goblin head that appears in Air Man's stage. Its horns lift slowly and periodically to damage enemies, and if an enemy stays on its head, it will use small versions of himself (Petit Goblin, see below) to remove them. It was originally used in a robot circus.  The Time Stopper is a good weapon to use on it, as it will prevent its horns from rising and it won't release Petit Goblins, making passage across them easier.
Petit Goblin (プチゴブリン,Puchi Goburin?), also known as Gremlin in the Mega Man 2 instruction manual for the U.S., is a small Goblin that appears from the ears of a Goblin when an enemy stands on his head. They are a good way to win items, if the player stays on the head of the Goblin using Leaf Shield. It is called "Puti Goblin" in Mega Man II.