As his name implies, he's a smaller version of Buzz Lightyear.
He is first seen with the Fun Meal Emperor Zurg when he talks about being played with. He then sees Bonnie Anderson with her Buzz and Rex. He then ambushes Bonnie's Buzz and replaces him with himself in the ball pit. Bonnie takes Fun Meal Buzz and Rex home. Fun Meal Buzz managed to convince Rex that the plastic in the ball pit made him shrink. When they get to Bonnie's room, the toys know this is not the real Buzz (except a gullible Rex). As Fun Meal Buzz skates around the room, eagerly awaiting playtime, Woody tries talking to him but the little toy snatched his hat and slapped Hamm in the rear before he is tackled by Woody. The toys tie Fun Meal Buzz to a glue bottle until the real Buzz finally escapes the restaurant and returns to Bonnie's room. In the end, real Buzz takes him back to the Poultry Palace, where Mini-Buzz joins the support group for Discarded Fun Meal toys and becomes his "sponsor."
- His line to Bonnie's other toys is similar to a line said by the real Buzz after Andy Davis first got him in Toy Story.
- He's the second antagonist modeled after Buzz, the first being Utility Belt Buzz from Toy Story 2.
- He is voiced by Teddy Newton who played Chatter Telephone in Toy Story 3.
- He apparently smells like nuggets, going by a comment said by Woody.