>>50901572>3rd versions>yellowYellow is not a 3rd version, it is a special 4th version.
Japanese blue is the 3rd version to japanese red/green.
The west never got the first versions, instead they got two games based on the japanese blue and then yellow, thus they got the 3rd, 3rd and 4th versions of gen 1.
Only Crystal, Emerald, Platinum and USUM are 3rd versions, the latter split into two to sheckles more money.