>>49296520If you're patient with the 5% encounter rate in Dark Cave, and set your clock so that you can play in the morning, yes.
But in Crystal, Teddiursa's moveset is pretty underwhelming until you get Headbutt in Ilex, or Return in Goldenrod (on a Sunday...). And Ursaring needs to use his mediocre 75 SpAtk for Ice and Thunderpunch in gen 2 instead of his busted 130 Atk. still one of the easier Pokemon to rush through the game with, though.