Rupert and the Sea Serpent (S03E09)

Podgy and his cousin Rosalie are caught in a relentless rivalry. Their constant bickering escalates when they both discover a mysterious sea serpent lurking near the shore. Determined to outdo each other, they embark on a daring adventure to uncover the truth behind the creature. As they navigate the challenges of the sea and their own competitive spirits, they learn important lessons about teamwork and friendship, ultimately realizing that working together might be the key to solving the mystery and putting their feud to rest.