Enter the options screen and select "Codes" Then enter one of the following. Repeat the code to disable it.

XSNSPORTS	Xbox ball
FUNKY	ABA Ball
CHANGEBALL	WNBA Ball
BAMBIBOOM	Volleyball
CHALK	8 Ball
DIEGO	Soccerball
CONCERTSPIKE	Beachball
DOWNTOWN	Chicago Skyline Stadium
ARELESS	Accept All Trades
IMFLYING	Easy Alleyoops
HOTSAUCE	Unlimited Turbo
RAINING3S	Easy Three Pointers
MOONCHY	Small Players
UNLIMITED	Unlimited Created Player Points

Thanks to Revolution reader Joe!