Scary part: it opens up all sorts of Super Gameboy style companion carts. Mario Lands, Metroid 2, Mega Man series of games, Castlevania's, Final Fantasy Legends... all would benefit from this sort of SNES-Super Gameboy treatment...
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To-do manuals: Arabian Knights, Gulliver Boy, Dark Law, Brandish 2, Flying Hero
Finished manuals: Neugier, Wonder Project J, Burning Heroes, Star Ocean, FEDA, Monstania, Chaos Seed