At the title screen (while BGM is playing) press the following buttons. NOTE: the lyrics will appear after about 14 seconds.
Effect Code Karaoke (Lyrics) Press and hold L, R, Select
Secret Characters (Use the enemy characters)
To play as these characters first hold both L and R at the character select screen. While these buttons are pressed you can freely move the selection cursor around the screen. Select a specific part of the screen (read the Secret Character Guide FAQ for more details) and press Y, A or B to play as the character. NOTE: this also works in 2 player mode. also, while using this code, the player 2 can choose the same character as the player 1 (or vice versa).
Effect Code Secret Characters Hold LR and then press Y, A, or B
Go to the Option mode, move the cursor to EXIT, and then press START while holding LR and SELECT.
Effect Code Sound Test Hold L+R+SELECT and then press START
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