why slaking? There are way better options for a physical sweeper. If you end up keeping it(which you really shouldn't) replace body slam with giga impact, and replace power up punch with something like Earthquake. Zurkitree should have tail glow instead of calm mind. if you want to run salac chandelure, replace energy ball with substitute, or just replace calm mind with hp fighting and slap on a choice scarf. In the grand scheme of things power-up punch really isnt a good move, so just swap regirock's PuP with stealth rock. Also, I do want to mention that if you really love slaking, switch Chandelure for Cofagrigus. Just skill swap mummy onto an opponent/ predict a hit and then the enemy recieves mummy. Then bring out slaking and hit the enemy with a move, and now you don't have truant and the enemy does instead.