The Two Shell Treaty (2012)

Disclaimer: Super Mario Bros. Z is a British fan-made flash-animated web series created by Mark Haynes. It is a crossover between the Super Mario and Sonic the Hedgehog franchises.
It was one of my all-time favourite sprite animations as a kid. It is sad that the series never got a proper ending. I'll try to give it a saiysfying conclusion. I hope you enjoly