Question about ookido_green_(classic)

I suppose ookido_green_(classic) is for Ookido Green in the Generations I and II. (RGBY/GSC, but not FRLG/HGSS) Is that correct?

Yes, either with his RGB attire (though I'm not sure if I've seen any art of that aside from his sprites) or that purple shirt thing, a la the animated series.