Complex sentence: The neko ninja were featured in an episode of the 2003 Teenage Mutant Ninja Turtles series called "The Real World Part One", where Leonardo was transported to their world by a vilian called Ultimate Drako.
Split into simpler sentences: The neko ninja were featured in an episode of the 2003 Teenage Mutant Ninja Turtle series called The Real World Part One. Where Leonardo was transported to their world by a vilian called Ultimate Drako.