BMO

Beemo is Finn and Jake's video game system. He makes his appearance in the title scene of every episode of Adventure Time with Finn and Jake just before the two punch their fists together. He made a cameo appearance in the episode Evicted, being played by Marceline while Finn and Jake are going house-hunting. He is also seen in Business Time when Finn and Jake are playing Adventure Master on him. He is later seen in the episode My Two Favorite People.

Appearance
He is a small green handheld gaming device sometimes appearing with two controllers attached.