You must first enter the Secret Options Menu. When on the 
Character Select screen, choose the Hidden cursor with the 
A Button so your cursor disappears. Using either the Control 
Pad or Stick, press Up, Up, Up, Left, then press Run and Block 
simultaneously (default buttons are C Left and C Down). When 
the match starts you will be playing as Goro! 
Note: Goro will not save on the Controller Pak. You will have 
to re-enter the code if you turn the power off to the Nintendo 64 system.