One Piece: Heart of Gold (2016)

Olga, a girl with crucial knowledge about the location of Pure Gold—a substance capable of purchasing the world—finds herself in the crosshairs of the World Government and the greedy Mad Treasure. Seeking refuge, she joins the Straw Hat Pirates on a daring adventure to uncover this legendary treasure. Their quest leads them to the mysterious island of Alchemi, hidden within the belly of a colossal angler fish named Bonbori. Together, they navigate perilous challenges, ultimately discovering the true value of friendship and loyalty amidst the allure of riches.