Distorted Travesty. It’s an RPG platformer where you run through an assortment of game worlds, there are levels based on Mario, Kirby, Castlevania, and other franchise.
It’s made by Dark Yoshi, or ZephyrBurst, or was it Joewhocares? I’m not really certain which i’m supposed to call him. The games are freeware, and both it and it’s sequel, as well as information on the next installment, can be found at this blog: http://distortedtravesty.blogspot.com/
For more info you can watch this review:
Or inspect these game trailers:
What’s more you can find an interview with the author here: http://www.gamerzsnark.com/joewhocares_interview.htm