Hey look a this guy's, i was hanging out on ebay and i found this surnatural appearance.

Pretty neat huµ ? It seems that some one have found a way to port celeste in a homebrew GBA cartridge.
I'm really curious about the process to reach such a chimeric combo, was it more a work about software or hardware ?
And i was wondering if it's possible to make it for gameboy color what i feel more legitimate and aesthetic for a pico 8 port ...

If you want to see the selling page:
https://www.befr.ebay.be/itm/Celeste-Classic-Pico-8-version-for-GBA-Nintendo-Gameboy-Advance-custom-cartridge/324042840881?hash=item4b72755b31:g:Qo8AAOSwHLFeHo9d