gen2 pokemon and ecdn some gen1 without their gen4 evolution are really bad and a lot of pokemon have fucked up movepool
FireRed was the first Pokemon game i ever played, and my first real long game experience ever. nothing will ever beat FireRed in my heart, it has everything you want from Gen 1 and more, and it doesnt really beat around the bush in challenge either
Pokemon Black2/White2 were the best.
Pokemon red, back in 99, it was AWESOME.