His first act of malice was the apparent murder of his human half and blowing up Vlad Masters' entire mansion before unleashing ten years of pain and destruction on both the Earth and the Ghost Zone.
Unfortunately, Danny ends up getting trampled by the team as they come charging onto the field.
Honoring the boy's wishes, Vlad separated Danny's human half from his ghost self, but then the latter retaliated afterward and did the same to Vlad.
Catch you on my comeback tour! He is effectively Danny's worst enemy, and is willing to kill to get what he wants, even if it is the people he once cared about.
Jack: I remember when I was that naive.
She also learns how to tone down her serious nature and discover her inner child.
Who is the strongest ghost in Danny Phantom? The only person more modest than Danny is Sam and I'm pretty sure a bat cape and veiled hat is overkill.
She's an adult stuck in a teenage body and wants to be a good role model for her younger sibling, and is often concerned about his development and well-being, much to his annoyance.