Probably the best baton passer due to the fact that it can deal with all phazers except Raikou. Options to pass include Growth, Agility and Substitute. Being one of the fastest Pokémon around also helps his cause. Additionally, with a Growth set and after eliminating his best counters, Jolteon can sweep on its own.
Undoubtedly a great physical attacker in GSC OU. With his high attack and Cross Chop alongside other physical attacks, he can be deadly. Even though he can't easily switch in, not many things can switch into him either. He can be an all-out physical attacker, a curse sweeper or, if one is concerned about Cross Chop's low PP, he can also be a Resttalker. And he scares the shit out of Snorlax for sure.