Famicom + Famicom Disk System
Super Famicom + Super Game Boy
Game Boy + Game Boy Color
Game Boy Advance + Game Boy Player
SG-1000 + SC-3000
Master System + Game Gear
Mega Drive + Mega CD
PC Engine + PC Engine CD + SuperGrafx
MSX + MSX2
ColecoVision
Neo Geo Pocket + Neo Geo Pocket Color
WonderSwan + WonderSwan Color + SwanCrystal + Pocket Challenge V2