Mario & Sonic at the Olympic Games

Back in the '90s, you couldn't get Mario and Sonic in the same room together. The little blue hedgehog always looked up to Mario, but the plumber's indifference to his quick imitator caused a rivalry that seemed like it would never mend.

But that was then, and this is now. Sega's been out of the hardware game for over a decade, and Sonic's appeared on every system known to man—including Nintendo's. Mario and Sonic at the Olympic Games may not be a very good series, but seeing these two characters headlining the same game was a milestone for game mascot relations, and continues to inspire hope that one day Lara Croft and Nathan Drake can make beautiful, beautiful, pixely babies together.