I can change the skin in this template? And how? If i can
I can sell my game with this template, like use the same code but with new additions like (character creator, new specials attacks etc)?
Viewing post in Platform Fighter Template comments
Sure, changing the skins is by simply replacing the object animations with the new one, but it must match the exact fight style (like Attack1/attack2/attack3) if your skin doesn't have this exact combo, then you're going to need to adjust the events (codes) to support the new fight style for your skin.
Of course, you can publish/sell games from the template even if you didn't add or change anything in the project, the only thing you are not allowed to do, is selling the template as Template not as game, even if you adjusted the codes.
You can read more about the license at the bottom of the template itch page.