To play as Jackal WITHOUT CODES, collect 50 coins in the Ice Camp bonus 
round before time runs out. The portal to the bonus round is accessed by 
standing in front of a star-studded door that is near the end of the Ice 
Camp level. (In the cargo maze near the end of the level, head to the 
upper-right portion of the maze and walk up the ramp. Shoot the boxes to 
reveal a door with a star on it. The star-studded door will transport 
players to a bonus level on the docks.) 

Alternately, to play as Jackal WITH CODES, raise Wizard to level 10. 
Then, at the character selection screen, hold Turbo and choose the same 
character. Wizard will turn into Jackal!