@ MrPhantasmYT First of all, I would like to apologize for taking so long to respond. I couldn't access my profile screen, every time I tried, Wattpad closed. Now to my answer, Unfortunately, I'm not familiar with Mario's Madness, but I would say that to maintain a good balance, I would perhaps only introduce a handful of new characters if they weren't in the original story. Since we already have so many characters, plus those in Mario's Madness, I would say four to six, maybe eight new characters. But if Mario's Madness has only a few characters, I would say use half that number.