well what you do is go to 1 go to data folder 2 select system.def 3 click it 4 there will be a thing that says columns and row looks like this columns: 10 row: 10 use ctrl+f to find it quicker then change the numbers there to 20x20 columns:20 rows:20 and thats how to add more char slots
MugenPlus does come with a healthy amount of slots (plus, I think it's supposed to be unlimited). That's why I switched over to it until I could find out how to add slots. Does anyone know if the above info would work on MugenPlus?