While most prefer the Batman: The Animated Series character designs to those of The New Batman Adventures, I do think they improved on a few of the villains. : r/batman
Wizard101": The Cheating Bosses of Empyrea - LevelSkip
Creature:Common Killer - Wizard101 Wiki
Creature:Killer Krok - Wizard101 Wiki
Wizard101: Skeleton Key Boss Guide (Verboten Mimic, Captain Hockins, Sapoti) - Swordroll's Blog | Wizard101 & Pirate101