Does anyone know of any RPG Maker apps on Smilebasic?

Not any that i know of, though the likelihood of one existing is very small.

Not possible with sb's small processing power.

That doesn't exist because: 1.- Copyright issues 2.- SmileBASIC is, well, SmileBASIC 3.- People realize that, instead of making a full IDE for making an RPG, making functions and small frameworks is way better.

no, but i know an rpg maker on eshop. rpg maker fes. but the maker is 40 dollars. the player(where you play rpgs) is free.

No, but you can make your own editor. It's not hard to make a map editor (In fact, I made one for my game) but an event editor is too complicate to make (Because of the use cases that you need to handle).