Bubble Guppies S6E23 Mystery on the Guppy Express!

Bubble Guppies Season 6 Episode 23 Online – When Oona's Bubble Kitty goes missing aboard the Guppy Express, sly Detective Nonny steps in to help. Knowing the cat must still be on board, they race to find her before the train reaches its next stop--and the kitty may be lost for good.