I'm going to second the use of earthquake on Empoleon. It's really useful in a lot more situations than you might expect, getting magnezone on the switch being only one of many. Furthermore, I don't think it's good to use both defog and stealth rock on the same set. Typically you only get one move in before something can force you out and it's quite unlikely you're ever going to be able to defog and then set rocks against a good opponent that keeps the pressure up with electric stabs and strong fighting/ground attacks. Having both SR and defog also means you only have 2 slots for coverage, and with a movepool like empoleon that's quite a sacrifice. Just pair it up with a good SR partner (of which there are so many, getting type synergy with empoleon is really easy to do)
Empoleon @ Leftovers
Ability: Torrent
EVs: 236 HP / 20 Def / 252 SpD
Sassy Nature
- Scald
- Earthquake
- Ice Beam / Flash Cannon
- Defog
This is "bulky offense" in a nutshell