Suggestion:
Ferrothorn would benefit your team the most. Having the great typing and putting a tank in your team for defenses.
Ferrothorn (F) @ Leftovers
Trait: Iron Barbs
EVs: 252 HP / 132 Def / 124 SDef
Careful Nature (+SDef, -SAtk) or Sassy Nature (+SDef, -Spd)
- Toxic
- Leech Seed
- Protect...