Some codes
1E Enable Code (Must Be On) 0000D02A 000A 1002D80A 0007
1 Always Low Time 83005C80 0000
2 Infinite Retries 3300000C 0003
3 Max Coins 33003D10 006..
some codes that i found
Character Modifier 83003BE4 00??
Quantity Digits to Accompany Character Modifier
01 - Luigi
02 - Bowser
00 - Mario
03 - Princess Peach
04 - ..
get 99 coins - 8c1a761b31e2378b