Virtua Fighter
Stage-Select Code and Change Ring Size:
At the title screen, press Up 12 times. Scroll down the options menu until none of the options are highlighted. Press A and you'll enter a hidden option menu that allows you to pick your stage and adjust the size of the ring.
Play as the Boss Dural:
Start a regular VS or Arcade game. At the Fighter Select screen, press Down, Up, Right, and simultaneously press A and Left. You should be able to play as the boss, Dural. Do this pad trick on two controllers for a boss versus boss fight.
Virtua Fighter Kids
Wireframe Mode:
Start a new game and at the mode-select screen, pick "Arcade Mode." Then pick any fighter at the player-select screen. When the box appears with the Normal and Kids modes, press and hold the L button, then select either mode. Hold L until the match begins. When the fight starts, you will have a battle like the first-person Punch-Out game!
Play as Dural:
To play as silver-colored Dural, do the following at the fighter select screen: Press Down, Up, Right, then press A and Left simultaneously. Silver Dural appears in the figher box.
To play as gold-colored Dural:
Do the following at the fighter-select screen: Press Up, Down, Left, then press A and Right simultaneously. Gold Dural appears in the fighter box.
Virtual On
Play as Jaguarandi:
At the title screen when the words "Press Start Button" are flashing, simultaneously press and hold Down, L, and R. With these buttons held, press Start. Start a game in Versus or Arcade Mode, and at the fighter select screen, keep pressing Right until you reach the hidden fighter Jaguarandi.