Fight as Dural:
Press Down, Up, Right, A + Left in the character selection screen. A sound will confirm correct code entry.
Adjust fighting ring size:
Press Up(12), Start at the title screen when the phrase "press start" is displayed. Enter the options menu, move the cursor below the "Exit" option, and press A.
Hold A + B + C during the opening demonstration.
Hold L + R and press Start at the title screen.
Press X + Y + Z at the title screen. The phrase "Freeplay mode" will appear in the bottom-left of the screen. The game cannot be paused during a match.
Add Dural to Vs. mode and Records screens:
Press Up(17), Start at the title screen.
Press Down/Right + C + L + R + Start at the title screen. Alternatively, set everything on the options screen to their default setting. Successfully complete the game without a single loss to unlock ranking mode.
Character and level select:
Complete a match in versus mode, then press L + R. A menu that allows character and level selection will appear.
Hold Up and press A while choosing a fighter at the character selection screen.