When a scientist make a portal that connects to different worlds the two biggest video game worlds combine.
Crossover - Sonic the Hedgehog & Mario - Rated: K+ - English - Adventure/Romance - Chapters: 4 - Words: 2,016 - Reviews: 4 - Updated: 12/3/2014 - Published: 9/18/2014 - [Cream/Cheese, OC] Sonic