Green098 on 19 February 2019
1 - Pokemon Red/Blue/Yellow/Fire Red/Leaf Green/Let's Go
2 - Pokemon Diamond/Pearl/Platinum
3 - Pokemon Ruby/Sapphire/Emerald/Omega Ruby/Alpha Sapphire
4 - Pokemon Gold/Silver/Crystal/Heart Gold/Soul Silver
5 - Pokemon Sun/Moon/Ultra Sun/Ultra Moon
6 - Pokemon X/Y
7 - Pokemon Black/White/Black 2/White 2
To be fair though, there really isn't any Pokemon game I haven't liked. I just liked some better than others.
