your team comp will lure gren, so take advantage of that. Don't mega evolve with slowbro turn one if your opponent can learn taunt, and if you don't need to mega to beat it, taunt is prevalent in this meta to stop stall, setup, and substitute. Metagross also beats most koko's with bdoze, and will beat every non-max speed Mgyarados with two tpunches, crunch mgyara is common, and max speed gyara is bad in 1v1. GL!