i tend to use my 3ds nowadays for a boatload of pokemon so this felt like a fun question
Post
Pokemon Silver (old, but gold)
Pokemon FireRed (cause its the only one ive really played, lol)
Soulsilver
Diamond
Pokemon Crystal Version. I have over 600 hours logged on the 3DS VC version and I'm working on completing the dex on my GBC cart. :)
Pokemon b/w or pokemon emerald
gold, sapphire, platnium, and moon