>>46928155I think that may have been due to the limitations at the time unless you know that for a fact. For example, Sneasel was brown and turquoise. There's also pic related.
Speaking of Charizard, subtle changes in orange make for an interesting case since some like Charizard and Camerupt got mapped to black meanwhile others like Dragonite, Kingler, and Trapinch got mapped to green.