User blog comment:KingOfSpriters13/Video Game Shared Universe Theory/@comment-4111066-20130120220249/@comment-4111066-20130120221157

@Chrome Mario is in Tetris DS

Mario is in Smash Bros Brawl

Snake is in Smash Bros Brawl

Snake is in Metal Gear

Raiden is in Metal Gear

Raiden is in PS All-Stars Battle Royale

Kratos is in PS All-Stars Battle Royale

Kratos is in Mortal Kombat

Pong is hidden in Mortal Kombat II