User blog comment:Jer155/how do i make a stage exclusive to certain characters?/@comment-24808209-20141007165629

The way I do it is giving each other character a stage that matches them, or is from their origin series. Heres an example of a non-boss character from my roster:

Scolipede1105,stages/Forest.def

Do this with the rest of your chars and that will prevent it from happening. This is the Only way I know of.