Today was looking for a Game Boy North America Time line. Was unable to find a usable one so i started to go over what i could find here is what i have composed. let me know if this is not correct or you have more data to support the time line.
Game Boy July 21, 1989
Game Boy "Play It Loud" March 20, 1995
Vibrant yellow
radiant red
gorgeous green
deep black
"high-tech" transparent.
Game Boy Pocket (MGB-001)
Silver September 3, 1996