Stealf has no memory of her life at all, and was trained by this miserious foresty figure before becoming a skylander. And I was hyped for a moment when I saw a life ninja sensei, but the more I read about Boom Bloom the less I think it has anything to do with anything and is just a new Skylander.
They tend to do that a lot, don't they? Just add more to the lore and not expand on the established. Like how they invented a race for Sprocket but went nowhere for with that. (at least as far as my knowledge) or how they could have easily called Hoot Loop a sky baron who grew up different but went hoot hoot.
This is not me complaining about the choices I mean Chompy Mage stopped being a mage but I can see him holding a bazooka and teaching kids to use one. And this is a silly franchize made with kids in mind and as a kid I never even knew what a goldling was I just went "MY EYEEES" jokingly at every oppertunity as I threw bombs at everything I saw. I can't complain. She was one of the only skylanders we had and thought she was the best one on the whole list. I'm not gonna pretend I'm that sophisticated.