DDB4-6F07 Start with 1 life instead of 5
D6B4-6F07 Start with 9 lives
D3B4-6F07 Start with 15 lives
F6B4-6F07 Start with 25 lives
7FB4-6F07 Start with 50 lives
14B4-6F07 Start with 99 lives
C222-D4DD Infinite lives
D964-A7D7 + D967-AFA7 Extra life at 5 coins instead of 100
DC64-A7D7 + DC67-AFA7 Extra life at 10 coins
1F064-A7D7 + F067-AFA7 Extra life at 20 coins
7464-A7D7 + 7467-AFA7 Extra life at 50 coins
DD32-6DAD Start and stay invincible most of the time
CBED-6DDF Stay as Super Mario, Fire Mario, or Cape Mario when you get 
hit--extra items may still fall out of box at top of screen 
CB28-DF6D Stay as Super Mario, Fire Mario or Cape Mario when you fall and die
D02C-AF6F Low jump
D42C-AF6F Super jump
DF2C-AF6F Mega-jump
C264-64D7 Infinite time--Some puzzles use the timer and you might need 
to switch off effects to continue
D2E5-A7AD Extra life with every dragon coin instead of 5
31B7-6F07 Start as Super Mario
CBB7-6D67 + D4B7-6DA7 + 3CB7-6FD7+ 69B7-6F07 Start as Cape Mario 
CBB7-6D67 + D7B7-6DA7 + 3CB7-6FD7+ 69B7-6F07 Start as Fire Mario
DFCE-64A0 Little Yoshi grows into big Yoshi after eating just 1 enemy instead of 5
D4CE-64A0 Little Yoshi grows into big Yoshi after eating just 2 enemies
D7CE-64A0 Little Yoshi grows into big Yoshi after eating just 3 enemies
D0CE-64A0 Little Yoshi grows into big Yoshi after eating just 4 enemies