Unlimited and Easy Green Coins
Complete career mode with all wrestlers to get unlimited Green Coins.

If you can't wait that long, then enter the Create-A-Legend screen and intentionally make a wrestler with poor attributes (stats all zero). Defeat him repeatedly in ladder and cage matches to get three Green Coins with each win.

Unlock Big John Stud
Select career mode and choose any wrestler. Defeat Big John Studd to unlock him at the shop.

Unlock British Bulldog
Select career mode and choose Dynamite Kid. Complete career mode to unlock British Bulldog at the shop.

Unlock Bruno Sammartino
Select career mode and choose Hulk Hogan. Complete career mode to unlock Bruno Sammartino at the shop.

Unlock Cheat Mode
Choose any wrestler in career mode. In career mode, start one of each of the match types. Then either finish the match or immediately exit. After all match types have been started, cheats can be purchased in the shop.

Unlock Owen Hart
Select career mode and choose Bret Hart. Successfully complete career mode to unlock Owen Hart at the shop.

Unlock The Man On The Moon
To unlock Andy Kaufman, select career mode and choose Jerry Lawler. Defeat Andy Kaufman to unlock him at the shop