Jeffrey Cruz is an Australian artist who crafts unique makeovers of classic cartoons. His remakes mostly feature older Cartoon Network shows such as The Powerpuff Girls or Johnny Bravo or other '90s cartoons like Dragon Ball Z.
Here are some his highlights below. Check out his DeviantART page for more and for details on how to get prints of these if you like them:
Dragon Ball Z:
April O'Neil from various Teenage Mutant Ninja Turtles shows:
The Powerpuff Girls (The villains in the background are just too awesome):
And here's a bonus, fan-art of the lovely 2013 cartoon Steven Universe: