Swords dance isn't available and stealth rocks may not be either.
Now, since EQ isn't actually available, I'd suggest everyone to look at a special niche that Garchomp still has.
Rough skin lets garchomp switch in on contact moves to heavily punish AI (If you switch in on a double slap the opponent will literally just explode), and with garchomp's offenses, this can easily result in free KOs. Run Rocky Helmet as your item, either 252 attack 252 speed or 252 hp 252 defense, and keep Stone Edge/Dig/Outrage as your "permanent" moves. The last move is filler for special situations, ie, a levitating steel type'd need to hit with brick break.