Area 5, Round 50 
     Go to the title screen, then go into the password menu then input
677261 as a password.

Fight enemy opponents only :
     Go to the title screen, then go into the password menu then input
075653 as a password.

Golden Balls
     At the title screen, hold I + Select and press Left + Up.

Passwords
     Enter the password in the password menu at the title screen.

Password:               Effect:
573300 	                Area 1, Round 1 (2nd Playthrough)
274510 	                Area 1, Round 1 (4th Playthrough)
344710 	                Area 1, Round 1 (3rd Playthrough)
321310 	                Area 1, Round 1 (5th Playthrough)
536300 	                Area 1, Round 1 (6th Playthrough)
301710 	                Area 1, Round 1 (7th Playthrough) 
075653                  Fight enemy opponents only
677261                  Area 5, Round 50