His first appericence is in asdfmovie7 in a scene where Mr. Muffin asks a man called Joey to eat him, but Joey refuses. Next, he asked a fat man to eat him but the fat man is stuffed. In his last appearance in asdfmovie7, the scene turns to a coloured scene and among the panicking of the human characters in the scene, Mr. Muffin jumps up and asks, "Who wants a muffin?".
In asdfmovie8, there is a scene where a man asks "What time is it?". Mr. Muffin comes in with an over the top opening, saying "It's muffin time!". Unfortunately, he is reminded that it is actually 12:30. Finally just giving up, Mr. Muffin shouts "SOMEBODY KILL ME!".
He also appeared in Everybody Do The Flop song doing the flop with Desmond the Moon Bear and the Potato.
In The Asdfmovie, he appears to be in a bunch of scenes.
- There is a song that is called "It's Muffin Time" on youtube and samples several clips of Asdfmovie8.
- Mr. Muffin has been confirmed for asdfmovie10, but never made it into the final film.
- In one of the outtakes during the End Credits, Mr. Muffin accidentally tells the fat guy, "You're fat!" just because he couldn't resist.