Cheat Description: Key Item Modifier

Slot 1 91xxBDD8
Slot 2 91xxBED8
Slot 3 91xxBFD8
Slot 4 91xxC0D8
Slot 5 91xxC1D8
Slot 6 91xxC2D8
Slot 7 91xxC3D8
Slot 8 91xxC4D8
Slot 9 91xxC5D8
Slot 10 91xxC6D8
Slot 11 91xxC7D8
Slot 12 91xxC8D8

Replace xx with the following:
07 - Bicycle
36 - Coin Case
37 - Itemfinder
3A - Old Rod
3B - Good Rod
3D - Super Rod
42 - Red Scale
44 - S.S. Ticket
45 - Mystery Egg
46 - Clear Bell 
47 - Silver Wing
73 - GS Ball 
74 - Blue Card 
7F - Card Key
80 - Machine Part
81 - Egg Ticket
85 - Basement Key
86 - Pass
AF - Squirtbottle
B2 - Rainbow Wing