what would you do when you see red rose brings out her hammer and puts it behind her back

I would bring out a baseball bat and say "NO RECOLORS OF AMY YOU PIECE OF ART THEFT!!!" and chase her around.
Recolors of Amy make her mad. Dosnt matter what generation it is. Please. Think of poor Sonic...
Image Credit: Evan Stanley and SEGA®

Laugh at just how much your recolour fails.

I would say 'Amy! Why have you dyed yourself purple??'
^^

either that or wonder whether it was the purple secret lovechild of Amy and Sonic ^^ lol x

Starlight: I would tell her Mom! heh heh