Mike (aka Mike Wazowski, Mikey, Googley Bear, Uncle Mike) is a character from the Pixar Monsters, Inc.. He may be used in:

the Monsters University Play Set with Disney Infinity 1.0 (only)
the Toy Box for Disney Infinity 1.0 and later,
all Disney and Pixar Toy Box Games for Disney Infinity 2.0, and
all Toy Box Expansion Games (Disney Infinity 3.0).
“Mike’s Scare Pig Dash” is added to the Disney Infinity 1.0 Adventures menu when the figure is placed on the Disney Infinity Base.

A figure for the game was showcased at Toy Fair 2013 and was not in any packaging.[2] Mike was released on August 18th at launch. He is sold both alone and in the Sidekicks Pack.