Bonus match up
Press [Circle], [Up]x2, [Down]x2,
[Left], [Right], [Left], [Right] at the "Press
Start" screen, to unlock the "Bonus Match Up" option
at the main menu. The phrase "Bonus Match Up" will appear
to confirm correct code entry. This allows you to play as Itchy
and Scratchy, Kodos and Kang, or Burns and Smithers, as well as
choose any arena. Alternately, win the New Challenger, Defender,
and Champion circuits
Bonus ring
Press [Circle], [R2], [R1], [Circle],
[R2], [R1] at the "Press Start" screen. A
sound will confirm correct code entry.
First player to zero health loses
Press [Circle], [R1]x3, [Right], [Left]
at the "Press Start" screen or after pausing game play.
A sound will confirm correct code entry.
Unlimited energy
Press [Circle], [R1]x3, [Down], [Up]
at the "Press Start" screen or after pausing game play.
A sound will confirm correct code entry.
Multi-rope attack
Press [Circle], [R1]x3, [Up], [Down]
at the "Press Start" screen or after pausing game play.
A sound will confirm correct code entry.
Mirror matches
Press [Up]x2, [Down]x2, [Left], [Right],
[Left], [Right], [Circle], [L2], [Circle],
[R2], [Circle], [L1], [Circle], [R1]
at the "Press Start" screen or after pausing game play.
A sound will confirm correct code entry.
Play as Bumblebee Man
Press [Circle], [Left], [Up], [Left],
[Down], [R1] at the "Press Start" screen or
after pausing game play. A sound will confirm correct code entry.
Alternately, when you play the game in the New Challenger Circuit,
you will eventually fight Bumblebee Man. Defeat him and save the
game to unlock him on the character selection screen.
Play as Moe
Press [Circle], [Left], [Up], [Left],
[Down], [L1] at the "Press Start" screen or
after pausing game play. A sound will confirm correct code entry.
Alternately, when you play the game in the New Challenger Circuit,
you will eventually fight Moe. Defeat him and save the match to
unlock him on the character selection screen.
Play as Professor Frink
Press [Circle], [Left], [Up], [Left],
[Down], [R2] at the "Press Start" screen or
after pausing game play. A sound will confirm correct code entry.
Alternately, when you play the game in the Defender Circuit, you
will eventually fight Professor Frink. Defeat him and save the
match to unlock him on the character selection screen.
Play as Ned Flanders
Press [Circle], [Left], [Up], [Left],
[Down], [L2] at the "Press Start" screen or
after pausing game play. A sound will confirm correct code entry.
Alternately, when you play the game in the Defender Circuit, you
will eventually fight Ned Flanders. Defeat him and save the match
to unlock him on the character selection screen.
Play as Itchy or Scratchy
Press [Circle], [R1], [R2], [Circle],
[R1], [R2] at the "Press Start" screen or
after pausing game play. A sound will confirm correct code entry.
Big Ape arena
Press [Circle], [R2], [R1], [Circle],
[R2], [R1] at the "Press Start" screen or
after pausing game play. A sound will confirm correct code entry.
Big arm mode
Press [Circle], [L1], [Circle], [R1],
[Circle], [L2], [Circle] at the "Press Start"
screen or after pausing game play. A sound will confirm correct
code entry.
Big head mode
Press [Circle], [L1]x3, [Up], [Down]
at the "Press Start" screen or after pausing game play.
A sound will confirm correct code entry.
Flat mode
Press [Circle], [L1]x3, [Left], [Right]
at the "Press Start" screen or after pausing game play.
A sound will confirm correct code entry.
No outlines
Press [Circle], [Right], [Up], [Right],
[Down] at the "Press Start" screen or after pausing
game play. A sound will confirm correct code entry.
Funny credits
Press [Circle], [L1], [Circle], [L1],
[Circle], [R1], [Circle], [R1] at the "Press
Start" screen. A sound will confirm correct code entry. Then,
select the "Credits" option.
Display game completion date
Press [Square], [Circle], [L1], [R1]
at the "Press Start" screen or after pausing game play.
A sound will confirm correct code entry.
In-game reset
Press [Start] to pause game play, then hold [Start]
+ [Select].