For worst parent, I would have to say Milia from the Macross series. That's only based off of the scene in the original Macross anime where Milia throws her baby to Misa so Misa can hold the baby. I don't care that Zentradi babies are supposed have stronger bones than Earth babies, you just don't throw your baby and hope the other person catches. I also thought Baki's parents from Baki the Grappler were kinda crappy, but that's just me.

I can't really think of anyone who would be considered a good parent. Maybe Cecil and Rosa from Final Fantasy IV during the After Years game? Laguna from Final Fantasy VIII was a good "father" to Ellone in that he saved her but could be considered a crappy dad to Squall since he wasn't there for Squall's birth or Raine's death that caused Ellone and Squall to become orphans.