Same as me. I haven't played Pokemon games since I was a little kid, but I used to spend a lot of time playing on the old systems. They were pretty fun. I'll try emulating them on my phone.
I've played Red, Blue, Yellow, Black, and X. I plan on picking up Omega Ruby either today or tomorrow!
One from every "series". I've played: Blue Silver Ruby and Emerald FireRed Diamond and Platinum SoulSilver White and White 2 X Alpha Sapphire
I've played at LEAST one of each 'set' of main games. For some generations, I've bought both. The only generation I don't have an actual physical copy of is Silver/Gold/Crystal (I do have Heart Gold), but I played Silver as a rom when I was younger, if that counts. It's crazy to pop in the old games and look how FAR we've come since then!
I have played all of the old versions and dozens and dozens of hacked versions, I haven't played any of the new 3 versions however.