Official pokemon story timeline confirmed by Matsumiya
Red/Green/Blue/Yellow = Ruby/Sapphire/Emerald -> (2 years later) Gold/Silver/Crystal = Diamond/Pearl/Platinum -> (time gap) Black/White -> (2 years later) Black 2/White 2 = XY
(source) *it’s 3 years between Kanto and Johto (as stated in-game, the tweet give no numbers). Interesting though!
















