Boss Rush (Japanese Version)
At the title screen, press:
Effect Code Boss Rush Mode A, B, A, Select, Select, Select, Right, Up, Start.
Invincibility (Japanese version)
Press B, B, Select, A, Up, Select, Right and Start before the title screen appears. If done right, the word MUTEKI will appear.
Stage Select (Japanese Version)
At the title screen, press the following buttons then Start to begin on the desired stage:
Effect Code Stage 2 A, B, A, A, A, Up, Down, B Stage 3 Select, A, B, B, A, Select, Down, Up Stage 4 Right, Right, Down, Down, Up, Up, B, Select, Select Stage 5 Down, Right, Left, B, A, B, Select, Select Stage 6 Up, Left, Left, Right, B, Select, A, Select
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