WWE WrestleMania XIX cheats and cheat codes for Gamecube

Unlock Revenge Stages
You have to complete Construction Site, Shopping Mall, Parking Lot, or Harbor. 
Then you can play Revenge Stages in Exhibition Mode and Revenge Mode.

Unlock The Bosses
You have to beat Revenge Mode. Then you can play as the bosses in Exhibition 
Mode and Revenge Mode.

Change costumes
Press L or R at the wrestler selection screen before match

Unlock Construction Zone revenge arena
Finish all the Construction levels

Unlock Harbor revenge arena
Finish all the Harbor levels

Unlock Parking Lot revenge arena
Finish all the Harbor levels

Unlock Mall revenge arena
Finish all the Mall levels

Unlock Extra revenge arenas
Finish Revenge mode

Unlock EX Special grapple moves
Finish Revenge mode

Unlock Revenge mode view in exhibition mode
Finish Revenge mode two time

Get all created wrestler items
Purchase all items in the ShopZone.

Easy Money 
Finish the tutorial mode and don't skip through anything to get $5000 cash. 

Get To WrestleMania XIX Hall
Beat all the missions.

Unlock Warehouse
Complete the first four locations of Revenge Mode.

Unlock Secret Moves
Gain access to more moves in the Create A Superstar mode by finishing Revenge 
Mode.

Do opponent's special:
When in the Special state, hit L + R + A + B.

Ex Special move:
Hit A + B + L + R when you have all three special bars full 
after your special taunt. 

Infinite Money 
First of all, start a Revenge game and save it. After that, in the Revenge menu, 
choose the option "Select Mission" and be a different character. After you beat a 
level in one of the missions, you'll notice that what you did in mission mode didn't 
count, but the cash you earned still remains! Do this until you have enough cash to 
buy everything you need to buy in the Shopzone! Submtted by Wortex