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I also thought that but I would need new animations for walking, jumping etc too...
Right now when I swap a skin, the skin has the same named animations, that's why I don't have to change it in the coding.
So I had to change everything to "set Player1 Animation to blue_walk", "blue_jump" etc.
Maybe you have a better overview when I show you my game...At the beginning you can chose a skin.
kingdanius.itch.io/league-of-pixels-2d-moba