@ SV Irradiate
Zerg: Scourges
@Zeal rush + fast cannon expansion
Protoss: Start making zealots as fast as you can too. By the time they get to your base, you have more. Then tech to reavers, make a few, and go own them with a mix of goons and zealots protecting them.
Counter this..
Zerg: Lurkers and dark swarm to hit your base, mixed with guardians and hydras to destroy any defensive structures that might be in the way, and quite a few ultralisks under the dark swarm as well, to protect the other units. There are also a few groups of scourges and overlords as well, to stop any air attack or detectors from getting too close.