Butterscotch in his rainbow power-up form, I've only seen one artist attempt to draw the gender swapped six using their rainbow power-up so I thought Id start off with Butterscotch since he's adorable /)//////(\

Edit: If you want to support me and my art, I now have a patreon! I'm just starting out and have only posted 2 images so far, but I'll be posting more soon, in fact I'll be posting there a lot more often than here now:

https://www.patreon.com/WishingStar