Honestly, if he's switching Ursaring out for a water type I'd go with Quagsire with the following:
Quagsire @ Leftovers
Relaxed / Unaware
252Hp 252Def 4Spd
- Scald
- Earthquake
- Stockpile
- Recover
Ok, so a pretty standard Quagsire. Big, bulky, never dies, and can near sweep a team at times...