NinjaCoachZ
Member
So going back to the series and comparing the original Japanese release dates to those of the updated versions
Green/Red -> Yellow; 2 years
Gold/Silver -> Crystal; 2 years
Ruby/Sapphire -> Emerald; 2 years
Diamond/Pearl -> Platinum; 2 years
Black/White - > Black/White2; 2 years
Sun/Moon - > UltraSun/Moon; 1 year
What happened here?
There was Blue released ~10 months after Red/Green. Then came Yellow 2 years after.