Double or Triple battles:
Togetic @ Eviolite
Ability: Serene Grace
Calm Nature, 252 Def, 252 HP, 4 Sp. Def
Follow Me - uses its great defenses from the eviolite to protect its teammates
Roost- Recover HP to further increase your shielding
Ancient Power- Coverage against ice, with its ability 20% chance of raising all stats (minus evasiveness and accuracy)
Baton Pass - Hand off the boosts to any other Pokémon in your team.
This build is used mainly to get pressure off your sweepers or set up in doubles or triples. It has fairly high HP and very good defenses, meaning it can withstand a couple supereffective attacks before needing to roost. Ancient power can be used whenever you have a chance and if you're lucky, you might get the boosts from it, which can then be passed on to any Pokemon on your team for a very strong entrance.