What's your strategy? Are you more offensive or defensive? Do you use substitute, baton pass or other clever moves?
As a young Pokémon trainer, my strategy was basically "KILL IT! KILL IT WITH FIRE!" (My favorite Pokémon was my Charizard, and its moves were Fire Blast, Flamethrower, Fire Spin and Fly. Don't judge me, I told you I was young.)
I still love that strategy.
I tried it on Pokémon Showdown once.
I was crushed.