How do you switch custom characters?

I put in a custom dry bones and I feel salty about it.

I don't understand your problem, but if you want to play as another custom character, then you go in any track, you pick the game mode, then you click on the icon with a big + and with a golden character. Then, you can choose any of the custom characters... I hope I helped you.

I said in my other comment, I feel salty about a custom Dry bones