Doctor Doom:
Complete the arcade game at the default settings.
Save the game to your memory card and input
this code at your Character select screen:
Tap Down then press and hold:
Down, Fierce kick, medium kick, light kick
in that order. (You will hear Captain America,
but you'll be doctor doom.)

Thanos:
Input this code at your Character select screen:
Tap Up then press and hold:
Up, Fierce punch, medium punch, light punch
in that order. (You will hear Spider-Man,
but you'll be doctor doom.)

Anita:
When both the above are enabled, you can input
this to get Anita:
Press: Up, Right, Down, Left, Up, right, down, left
then press and hold: Up, Light Punch, Medium Punch,
Firce punch.

Change clothes:
Hold down if the character is at the bottom of the select bar,
or up if at the top.

Floor Fighter:
Press select when the battle is over. You can now attack your
beaten opponent.

Lippy Move:
Tap Down, Down, Select, to activate your characters taunt move.

Halloween:
When you've activated a reality gem, you can press Select to lob
laughing pumpkins at your opponent