The Secret of Coocoo Island
It's just insane that they ended it abruptly like that. There was basically no ending after following them on this island for 40 episodes. The whole 40 episodes run was just too long for what they had to show in a sitcom. There were loads of empty episodes and bits that got nowhere. They had a unique setting that was excellent for a sitcom but they only took advantage of that for the first 1/5 of its run before losing track. They realized that which is why they tried to push for relationships and whatnot for the last 10 episodes but these were all bad with no decent bits to support it comedically. Overall, it was a very weak sitcom that wasted the setting's and the cast's potential.