His boss fight acts like a speed run through a level that has rising salt. Making contact with him will not kill Meat Boy. After beating Brownie, Meat Boy will try and save him, but fails as Dr. Fetus keeps pelting him with bricks. Beating him unlocks Chapter 4: Hell.
Brownie appears once again after beating Dr. Fetus and escaping from "his castle". As a boulder is just about to crush Meat Boy, Brownie comes to save him. He is thought to have died as he went down with the island as it was exploding. However, he appears during the credits popping out from his grave and then getting hit by a toilet that comes from Dr. Fetus' castle. The song that is played in this level is called "Fast Track to Browntown".
- He is also available as a playable character in both the Steam and Xbox 360 versions via a code using an Xbox 360 controller. To play as Brownie, you must have beaten The Factory and hit the following code on the controller in the player select screen really quickly without choosing the characters Gish or Alien Hominid: RB, RB, RB, B, B, B, X. (PC equivalent of Down, Down, Down, Esc, Esc, Esc, Enter) You should hear a voice saying "Push the Buttons!" and then you can select any character and you will be playing as Brownie.