Note also that Ash's Chikorita (Bayleef now) has Vine Whip. While it is a perfectly logical move for a Grass Pokemon to have in the anime, and in the GB games can be learned by Chikorita as an egg move, Ash caught it wild. So, how did it learn Vine Whip? Of course, there are a few things that more sense in the anime than in the GB games. For example, Tail Whip not doing damage in the GB games -- wouldn't it hurt, at least a little, to get whacked by a Pokemon's tail, especially if the tail's pretty big?