I was playing Pokémon Yellow for the first time in several years. I had assembled a pretty good team, a Squirtle, Butterfree (with Confusion), Ivysaur, Charmeleon, Pikachu, and Geodude. I had done the first three bosses, er, gym leaders, easily. But then I got to Rock Tunnel, which needs Flash.
But Flash is a sucky move in battle, and I don't want to waste my movesets on Flash, which cannot be removed. So I tried looking for Pokémon in the PC, "junk" Pokémon, I could use Flash on. Nothing except Clefairy, which I didn't even want to put on that.
So I just decided to go without Flash into Rock Tunnel. But I think I'll have to use it another time. What do you do in terms of Flash?