The Bugs Bunny Crazy Castle 2, known in Japan as ミッキーマウスII (Mickey Mouse II) and in Europe as Mickey Mouse or Hugo, is a video game originally developed by Kemco for the Game Boy in 1991. It is the sequel to the 1989 Nintendo Entertainment System and Game Boy game The Bugs Bunny Crazy Castle.

The Japanese version was followed by a sequel for the Family Computer, Mickey Mouse III: Balloon Dreams.

Bugs Bunny must save his girlfriend Honey Bunny from Witch Hazel's enemy-filled castle. There are 28 levels with keys to collect. In each level is a locked door leading to the next level; to open it, the player must collect eight keys placed throughout the level. Various Looney Tunes characters are encountered, including Yosemite Sam, Daffy Duck, Wile E. Coyote, Little Ghost, Moth and the Flame, Sylvester, Foghorn Leghorn, Tasmanian Devil, Beaky Buzzard, Marc Antony, Merlin the Magic Mouse, and Tweety.

In the 1995 European conversion, converted into the Hugo franchise, Hugo the troll's wife Hugolina gets kidnapped by the Horned King, ruler of the castle Arbarus, after agreeing to his invitation. Hugo goes to the castle to defeat the Horned King and rescue Hugolina.