>>27536544This, an example being running 2 status moves on M-Sableye. With the ability to use predicts you can catch rat boys off guard with that one. Knocking off Heatran's item, or turning an immunity into a benefit like when they expect you to use w-o-w and switch in with a fire type and get poisoned instead.
It's also good to know mechanics like the fact that toxic's counter resets when switching out. So instead of taking massive poison damage if you don't have a heal bell cleric using a mon as a hit and run attacker to get longevity out of it.
Think outside the box, like running AV on Tyranitar because of the immense special bulk that provides shutting down even moves that it would normally be weak against. Barring fighting and iirc only Lucario/M-Blastoise are real threats with Aura Pulse.
>>27536687If you're playing on carts against friends there are no restrictions iirc. You can play Battle Spot meta on Smogon for testing, but be prepared to play the same guys more than a couple times due to low interest in those tiers.
Run damage calcs to spread your evs accordingly.
>>27536739Rocks, Heatran, Rotom-w/h, Tyranitar, and bulky defensive water types are all good choices.
>>27536785Smogon isn't a bad place to start just don't expect them to be perfect strats as they're freely available and counterable. Also when checking Smogon click the Battle Spot sets for better ideas of what could check a potential pokemon because OU is the default and the sets and checks are tailored accordingly. E.g. Protean Greninja isn't in OU but Battle Spot doesn't adhere to that.