I've been playing Fallout: New Vegas and Fallout 3 for the first time! I decided to play FNV as Green Oak, then FO3 as Trainer Red. It's been Interesting.

Actually, Green slots in weirdly well as the Butch DeLoria to Red's Lone Wanderer. I'm thinking maybe in my little headcanon, he was Red's companion before crossing the country and turning up in Nevada to get into that game's events.