Having a bit of a brain fart moment so a word on Gameboy Advance emulation and palette files. Many Gba games are overbright to compensate for the lack of a backlight on the original gba handhelds. So in modern emulation, these games can look super bright. Bizhawk offers a number of palette options and whilst its probably impossible to say any one of them is perfect for every game, ill just made a quick image showing the effects of each one.
My preference is the Sameboy palette. Its stil bright and vivid but not so much that its overly crushing the greys like the bizhawk palette. Judging by the No$GBA palettes, The Gambatte palette is probably closer to an actual GBA SP. and the more vivid palettes closer to the NDS hardware. At the end of the day, it will come down to personal preference but ideally the best one for the game.