I'm afraid they use the same rules as normal animals. I'd personally waive any Handle Animal checks if the animal's friend is the one doing the training, particularly if they can use Speak with Animals. Doesn't make much sense to require a lot of conditioning if you can just explain to them what's going on.
Problem is, wolverines don't make good mounts. They're not that smart, and their rage means that you won't be able to run from combat when you want to. They'll only get six tricks, and those are more or less covered by the ability to use them as a mount in combat. Let's see here - as I recall from the PC I had that rode a dire bear, it was... Accept Rider, War Mount, Attack on Command, Attack Anything, Housebroken (the ability to hang around other people without causing trouble), and one other. I took 'Grapple' as my last one, which caused Rumbleroar to pin the designated target and hold them there until otherwise ordered. A wolverine might be well-served by learning tricks to either let them quell their rage, or track for you by scent.
If you have a dire wolverine as your animal companion and mount, I'd suggest you invest in a Wand of Calm Animal. Quite nicely cancels a wolverine's rage, allowing the animal to control itself again. Very useful little item for 'em. The last thing you want is to be strapped to a psychotic killing machine that has lost all sense of self-preservation.
