Thank you <3
You mean that you want to use my Fighting Template to create a fighting game in GDevelop, and in that game you want to give players the ability to import their own characters to the game ?
In that case, sure !
You bought the template, it's all yours, you can build/add/edit/remove anything you want in the template :)
The only thing that you CANT do with any of my templates, is re-selling/sharing the template GDevelop project itself.