Sucker punch mawile or a ghost type switched in the right moment (during the hyper beam for example) should do the trick. Or if you happen to have a prankster that can paralyze it turn one, that's good too.
The PULSE abra is a psychic/steel with magic guard. You can't burn it or toxic it, but at least it's speed can be halved with paralysis. And yes, it is weak to fire and ground, but that if you are fast and durable enough to hit it that is.
