''Syrup Village Arc'' episode 18

Episode 18 The straw hat pirates are out at sea suddenly the sky turns black and the sound of thunder echoes. They've approached the legendary treasure island. It's a famous island among pirates rumored that whoever gets close to it, faces God's anger. Getting past the storm, the crew landed on land. There were many strange plants and animals. There were a snake with a rabbit face, a bat with a panda face, a dog with a chicken face... . Suddenly, a strange sound ran throught the forest threatening Luffy and the others to either leave or they will turn into the animals they just saw. Turns out it was the island's guardian god. Since they refused his request, he threw god's judgement of wooden spears and animal attack. But unfortunately for this stupid god they were much stronger than to be intimidated by his empty threat. The truth turned out to a human stuck in a treasure box calling himself god in order to chase the pirates who come to the island to have its treasure for himself. His name was Gaimon, he spent 20 years stuck in the box living all alone. Then Luffy told him that he's the man who'll be the pirate king, aiming for One Piece thus heading to the Grand Line. Then Gaimon told him to rethink his goal, for the Grand Line is known as a hellish graveyard, breaking people's spirits turning them almost like zombies. As well as the numerous rumors about one piece that makes its existence doubtful. It's far beyond reach, a dream within a dream. However Luffy's optimism and smile did not disappear.
That made Gaimon remember about his past self where he was full of passion and chasing dreams as well. Telling them that 20 years ago when he was a pirate he came to that island along with hid friends to search for the treasure. However serching for a whole month they found nothing but an empty box. they pirates left forgetting to search one last place. That's where Gaimon went and found the treasure, but fell down and got stuck in the box. Therefore he has been living alone for 20 years guarding the treasure he's found. Then Luffy and the others offered to get it for him and went to the treasure's location. Regardless Luffy refused to give Gaimon the treasure. Gaimon understood that acctually there were only empty boxes up there. Then Luffy invited him to his crew but he refused saying that now after he got released fromn his illusion. He wants to stay and protect his animal friends. Then waving goodbye the crew left the island.