Item Codes:
Item Modifier - 01??ABD5 (See Modifier Digits for Items for ??) 
Pokeball Modifier - 01??F0D5 (See Modifier Digits for Pokéballs for ??) 
TM Modifier - 01??8ED5 (?? equals number of TM) 
Infinite TM - 01638FD5
Infinite Pokeball - 0163F1D5
Infinite Items - 0163ACD5

Modifier Digits for Items:
10=Thing that restores 200 HP
07=Bicycle
20=Rare Candy
Modifier Digits for Pokeballs:
01=Master Ball That's all you need!