Don't forget Slaking and Porygon2! Oh, and Linoone too! (extremespeed + belly drum + gluttony = awesomeness)
Snorunt is cute
If Slaking didn't have that ability, it'd be in Ubers.
Think about that for a moment.
If an event Slaking with Skill Swap would be given out, Slaking would be instant uber. It would be the biggest sudden tier jump ever.