Well, I saw him send out Pikachu first, I wondered, "Oh, great, is he gonna follow up with a Lv76 Metapod or a Lv83 Magikarp or something retarded like that?"
Snorlax was a bit of a pain to take down, but other than that with Pokemon in the 65-70 range he was cake.
Sadly with Snorlax gone in HG/SS, so was his one somewhat challenging Pokemon.