Bisharp would do nicely although Scizor would do even more nicely but I know that because this is in-game Scizor is hard to obtain. Bisharp / Scizor would cover Ice Types for your team and Bisharp can deal with the Psychic types that may threaten Breloom.
EVs: 52 HP / 252 Atk / 204 Spe
~ Swords Dance
~ Sucker Punch
~ Iron Head
I have put EVs there but I know that you probally won't use them seen as EV training In-Game is a pain.