Dunk from Anywhere
Pause the game and press L, L, C-down, L, L, C-down, L, L, C-down, Z.
(Thanks to DANMONEY_99@webtv.net)

Giant Players
Pause the game and enter L,L,C-right,L,L,C-right,L,L,C-right,Z.
(Thanks to Cooldude001@aol.com)