~Cheats~
Computer vs. Computer
At the title screen hold L1 + L2 + R1 + R2. Highlight "Player 1" and hold Down. The cursor should be on "Vs. Play". With all these buttons held, press Start.
Bonus Game
Hold Select + Start on Controller Two while turning on the Playstation. Use Controller Two to play.
Play as Neco
Beat the game as Zool and Extal to play as Neco.