Complex sentence: The Z-Stacks are the show's antagonists, who are based off the Toon Patrol from "Who Framed Roger Rabbit" which was released the same year as their debut episode who can be seen frequently trying to sabotage the good work of the Star Fleet.
Split into simpler sentences: The Z-Stacks are the show's antagonists, who are based off the Toon Patrol from "Who Framed Roger Rabbit" which was released the same year as their debut episode. They are frequently seen trying to sabotage the good work of the Star Fleet.