Complex sentence: The fourth and final error is that "Friend or Foe" shows that Mr. Krabs was born in a hospital with Plankton, but in "Grandpappy the Pirate", Mr. Krabs says he was born with his father on a pirate ship.
Split into simpler sentences: The fourth and final error is that, even though "Friend or Foe?" shows that he was born in a hospital with Plankton. Additionally, in "Grandpappy the Pirate", Mr. Krabs says he was born with his father on a pirate ship.