Originally Posted by Fat Kikuichimonji
I also wonder if Golem and Gyarados are seen anywhere in-game. I know that Blue uses a Gyarados (or can, depending on which starter he picked), which also fits well into the rules of our universe.
I'm pretty sure at least one opposing trainer uses a Golem, but I'd have to check a walkthrough. As for Gyarados, you can fish for them with the Super Rod, they become quite common.