If you arer looking for Fae Farm cheats, user Eiffel2018 has made some (Thank you!). you can check them out here :
https://gbatemp.net/threads/fae-farm-010073f0189b6000-14.639363/#post-10245639
https://gbatemp.net/threads/fae-farm-010073f0189b6000-14.639363/#post-10245639