Bubba the Rat is a Muppet character who first appeared in the movie Muppets from Space. He is performed by Bill Barretta.
Although Bubba doesn't officially appear until Muppets from Space, other unnamed rats with a similar design appear as early as The Muppets Take Manhattan in 1984. He has a supporting role in Muppets From Space, and brief roles in The Muppets' Wizard of Oz and The Muppets.
Bubba also is shown in the Entertainment Weekly Reunion feature, along with the cast of The Muppet Show, despite him not appearing until 17 years after The Muppet Show ended.
Bubba is the tough-talking leader of the lab rats who Rizzo befriended in Muppets from Space. In the movie, Rizzo helps Bubba to escape, and later Bubba helps Rizzo to save his friend Gonzo.
He also appeared with Rizzo and the other rats in The Muppets' Wizard of Oz.