Just an amusing concept people might want to consider: Running the wrong abilities on other things. I have had much success with Flame Body Nitro Charge Heatran. By not running a balloon, I can bait in Ditto, who expects to easily take a Fire move. Instead, I cripple it with a Wide Lens Magma Storm, causing a bit of residual damage, switch out knowing it can't do anything as I bring in my Suicune, getting a free CM up. I run Pressure Suicune, so Ditto can't just come in and laugh at my Surf.
This gen, you may want to avoid abilities that absorb types for the mindgames. Not quite as effective if your other ability is obvious, like Pressure, but still effective.
This gen, you may want to avoid abilities that absorb types for the mindgames. Not quite as effective if your other ability is obvious, like Pressure, but still effective.