By "Class pet" I mean the Artificers' dogs, the Druids' wolves, and the Skeletal Knights that Pale Master Wizards can get.
I know that the Skeletal Knight starts looking like, well, a Skeleton Knight, but becomes a Blackbone Knight at Wizard Level 9 and a Frostmarrow Skeletal Knight at Wizard Level 17.
And I know that the Iron Defender changes appearance early into Artificer levels, but I'm having trouble remembering how many Artificer levels it takes to make the dog change from the puppy-like appearance to the "normal" Iron Defender.
And since I've never played a Druid, do their Wolves keep the same model regardless of Druid levels or does it change appearance?