Board Thread:M.U.G.E.N Discussion/@comment-27277212-20151209021437/@comment-10227639-20151209235331

Check if they show up when you press CTRL+C in-game. If you're talking about an attack hitbox, then of course every CLSN1 (red hitboxes) need a respective HitDef of some sort (HitDefs, Projectiles, etc.).

I really am not some sort of tutorial, so I'll not go deep on how to make characters.