Magnezone likes to hold Leftovers and in general its other ability is the better option (Magnezone's ability is the single reason Skarmory is used less in competitive play these days, and is the reason I suggested a Shed Shell on your Skarm).
How long did it take you to get Close Combat and Crunch on Ursaring (considering they're both egg moves)?
Mine took three days to make (granted I also wanted max IVs in Speed and Attack and an Adamant nature).
You have three Pokemon weak to fighting, other than that you did a good job.
BIG question: How do you control/check what IV's a pokemon has?