Dark Arena

Dark Arena
Developer: Graphic State Games Publisher: Majesco Sales Platform: Game Boy Advance Released in US: January 19, 2002 Released in EU: February 15, 2002 This game has hidden development-related text. This game has a hidden sound test.

Build Version

At the title screen, hold down L or R, then press Start. A build number will appear at the main menu.

(Source: Cobra1 (GameFAQs))

Sound and Music Test

Enter NRYRDDS_ (where _ is a blank space) in the password screen and press Start. You'll hear someone laugh, and cheat passwords will be enabled. Now enter CRSDR___ as your password and press Start again. Exit the password screen and go to the options mode. Turning the "Music" and "Sound FX" switches off and on again will play back a different song or sound effect whenever you do so.

(Source: XAnimal (GameFAQs))