Quickly press Left(2), Right(2), Left(2), Right(2) at the jungle title screen before the game logo appears. A "Cheat" option will appear at the main menu.
Diablo's Pulverizer move
Hold 1 + 2 then press Up, Down.
Flash of light
Keep attacking your enemy and killing him. There should be a light change in the background. This is rare, but worth seeing.
Hidden bowling game
This is available only in two player mode, on any stage. Both players must play as Armadon and perform the Spinning Death (1 + 3, Away, Toward, Down) move simultaneously three times in a row. If done correctly, both players and their worshippers will walk off screen for a bowling game. Humans are used as pins, and the players bowl themselves by using the Spinning Death move.
Hidden volleyball game
This is available only in two player mode. When in the Cove (Sauron's stage), either player must perform a combo by completing two quick attacks in succession. Two humans will appear and bow. The player closest to the human must knock the human into the air. The other player must hit the human back toward his opponent before it hits the ground. The first player should continue to hit the human back to his opponent. After a while, a net and judge will appear, allowing volleyball to be played with humans.
Quick kill message
If you kill your opponent within then seconds a "Quick Kill" message will appear. Your enemy will remain dead on the ground. Note: This only works on the first round.
Skydiving cows
This is available only in two player mode. When in the Ruins (Chaos' stage), one player must be playing as Chaos in a Sudden Death round. Allow the match timer run down to about two to three seconds. At the this point, the player using Chaos must perform the Fart of Fury move (2 + 3, Toward, Up, Away) so that the cloud remains in the air after time expires. If done correctly, the falling meteors will turn into falling cows.
"Cheat" option...