Feliger tank and sweep

[Lord Windos]

For the first question, if not Giga Impact, you either use Slash for the higher crit Rate, Crush Claw for a chance to drop there DEF by 1 stage (50%, so its a pretty high chance), or Body Slam for maxium damage and a high (30%) to paralyze. Then have either Brick Break (Screens) , Counter (It can sponge a loooot of damage, so that's hurt a bunch!), Superpower (If you plan on switching it in and out often, and don't plan on using a Chesto Berry on it), or Bulk Up (Got to love those stat boosts!). Earthquake is also a good option as well, but if you have other Pokémon that can use it, might as well get them to shake shake shake!

As for items, either a Chesto Berry for it to immedianlty wake up on the first turn, Leftovers for more long term recovery, or Life Orb for maximum damage.