Chou Soujuu Mecha MG - Nintendo DS
Multiplayer mode:
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In order to gain access to the multi-cart multiplayer mode
of this game, you must complete mission number 39.
All Mecha's:
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You have to do this on a clean cartridge, so with no save on
it. When your typing your name, in the default alphabet type
the top left 3 times, then the bottom left 3 times.