File		Ext	Country	Info
Play	Mortal Kombat I & II Mortal Kombat I & II (J) [b1].gb	.gb	Japan	Bad dump 1
Play	Mortal Kombat I & II Mortal Kombat I & II (J).gb	.gb	Japan
Play	Mortal Kombat I & II Mortal Kombat I & II (UE) [!].gb	.gb	USA & Europe	Verified good dump
Play	Mortal Kombat I & II Mortal Kombat I & II (UE) [a1][!].gb	.gb	USA & Europe	Verified good dump Alternative version 1
Play	Mortal Kombat I & II Mortal Kombat I & II (UE) [a1][f1].gb	.gb	USA & Europe	Alternative version 1 Fixed dump 1
Play	Mortal Kombat I & II Mortal Kombat I & II (UE) [b1].gb	.gb	USA & Europe	Bad dump 1
Play	Mortal Kombat I & II Mortal Kombat I & II (UE) [b2].gb	.gb	USA & Europe	Bad dump 2

NES NinjaOnline Nintendo games

Mortal Kombat I & II Japan Bad dump 1