Currently, my only character is Whimsy the Wooper. He shouldn't be too hard to get along with. Just in case you're looking for an opposite type set, Whimsy is ground and water type, with the ability 'damp', which nullifies 'explosion' and 'self destruct'. That ability will be especially useful for swarms of skuntanks or voltorbs.
He is easy going and doesn't object to a lot of things, unless he deems them really ridiculous. Beware that Whimsy IS a Wooper, and Woopers are notoriously naive. He may just walk right into danger.
As a ground and water type, electric moves are generally ineffective or very weak against him, so if you're an electric type who loves to go all out, and are afraid you your partner may get caught in the wake, no need to worry!
I hope to hear some responses!