So Tara has a Trait she inhertited from her fathers side of the family where they know the bulk up up that becomes a egg move...as you should know YES I KNOW Tyrantrums cannot Learn Bulk up , in pokemon kingdom that rule are bended through family,Magic, all sort of jazz like that

But yeah Tara knows Bulk up and she can be a Strong Dino

And with Eric being a Z ring user...you will know soon : p