Had a copy of Kirby Super Deluxe (JP) and thought I’d give it a go converting it to English. Easy process – desolder the maskrom, replace it with a new maskrom flashed with the unheadered US ROM of Super Star, and solder it back in its place with a voltage regulator to drop down from 5v to 3.3v. works great! Also did the same for Mario RPG and a few hacks.
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Richretro 