Well, I have used Chlorophyll Venusaur and Solar Power Charizard with Drought Ninetales in B2W2 triples. It was like dropping hydrogen bombs on the enemy.
What a destructive team! :<
I hate to fight you in a Pokemon Battle!
It's kinda of a shame that there's no in-game Trainer that uses such deadly combinations in battles to make the Pokemon Battles really challenging. I remember the old days of Red and Blue, my Charmander and I lost against Brock and Misty so many times until I finally beat them and it was totally satisfying, unlike today where it's super easy to beat the first and second gym without too much trouble.
Well to be fair for the first gym, unless you picked the right type-advantage Starter Pokemon (Bulbasaur and Squirtle), there no other Pokemon that had a type advantage against the Rock Pokemon (Pikachu is the only early Electric-Type Pokemon and a rare one, the Bug Pokemon, Pidgey and Rattata, Nidoran M/F) making it quite the challenge.
Those were the days...