QAZ

QAZ Company is a maker of Bootleg games which mostly hacks Bubsy.

NES
Sonic X (Hack of Super Mario Bros. 3)

SNES
Sonic 2 (hack of DKC 2)

Animaniacs 50 (hack of Bubsy)

Game Boy
Bubsy 5 (hack of Mole Mania)

Chip 'N Dale 3 (hack of Pac-Man)

Genesis
Pac-Man 5 (hack of Bubsy)