Scyther is a fantasic pokemon in G/S/C. Not only is he one of the fastest pokemon in the game, but he also sports a high attack as well. He get's Slash, Wing Attack and the awesome False Swipe, invaluable for catching wild pokemon. He can evolve to Scizor, a good pokemon with very high defense and incredible attack, but does loose some speed as well as becoming double weak to fire attacks. Scyther can be caught in the bug catching contest in the National Park (South-West of Ecrutek and North of Goldenrod) on Tuesday, Thursday and Saturday. This is the only place that you can catch one. He is pretty hard to find and the Park Balls will have a difficult time holding him unless he is in the red and is either asleep or paralyzed, so Gastly is a great choice to catch him (just watch out for Pursuit). Scyther is VERY much worth it, though.