>>50825780>grind all the way to Lv 50-60What? Kanto is Level 40-45 until Blue and the trainers are all mid 30s.
In my last Crystal run I caught a Houndour as soon as I reached Kanto and soloed Sabrina and Erika with it with 0 prior grinding. That was enough to evolve it and from there you're reaching Level 30 so you can just grind it against the trainers to catch it up to your team.
Use your brain for once. Oh, and also play the games for once, since you clearly don't.