Pokémon X and Pokémon Y

you find it boring, but it's great for mindgames, especially with spikes and stuff around, heck, you don't even need to attack with the slaking, just switch him in, and switch to the counter of whatever the opponent is going to switch in.

But if your opponent has entry hazards, you repeatedly switching for 'mindgames' will hurt you a lot.
Slaking's just very very meh in his current state

Not to mention how much moves like fake-out and other flinch-related moves pineapple over your slaking because there isn't a next turn unless you switch, again making you vulnerable.