Ghost and Fossil Missingno depends on your character's name you choose int he beginning of the game. To get Ghost and Fossil, you need a W, X, and/or Y in either the 3rd, 5th, or 7th positions of your name. W is for Ghost, X for Kabutops fossil, and Y for Aerodactyl.
If I named myself WES (like I normally do), I'd just get normal Missingno. But if I were SEW (Wes backwards), I'd get the Ghost. But you can get more than one. Like if my name were AAWAXAY, I could see any of the 3 other forms.
If I named myself WES (like I normally do), I'd just get normal Missingno. But if I were SEW (Wes backwards), I'd get the Ghost. But you can get more than one. Like if my name were AAWAXAY, I could see any of the 3 other forms.