Red is the older brother of Green, and a resident of Yold Town. He has the job of guarding the bridge leading into the town. Red and his brother both are both very similar to the Mario Bros., however they are fiercely competitive as both of them cannot understand the other ones color choice. Red is also known to play cards with Chaz, his best friend, but he always loses.
In Super Paper Mario, Mario and Tippi have to see Red in order to get past the bridge that leads into Yold Town. However when they arrive in his house he appears to not be there, but if Mario flips into 3D he will find Red crying because he has gotten stuck in the 3D dimension. Mario can then pull him back into 2D, then Red asks what Mario's favourite color is. If Mario answers Red he will be let into Yold Town.