Achievements - IdleOn MMO Wiki
NOTE: Any achievements marked "Steam Exclusive" ONLY give rewards on the Steam platform. Some "Steam Exclusive" achievements will also only register as complete on Steam.
Achievements
Achievements
Ds with Gba Slot | eBay
What emulator + core is being used for games with achievements tied to GBA-slot on the NDS? It doesn't seem to be well-documented anywhere, but some people have clearly earned these achievements.