Wapol's Omnivorous Hurrah is the fifth Cover Story created as a side story on the title pages of each One Piece chapter. The story can be set between the events of Drum Island Arc and the timeskip.
Having been propelled onto an unknown island by Luffy, Wapol experiences life as a homeless man for the first time. Eventually, he uses his Baku Baku powers to create unique toys by fusing different objects together and begins to work his way back up the social ladder by selling these toys to children. In the end, he opened his own shop and married Kinderella.
Long Summary
On an unknown island, the landscape has been marred by someone taking bites out of it. That person is revealed to be Wapol, currently sporting a tree head after eating one. Wapol then eats a gas lamp, annoying the nocturnal animals at night, and then a bench, scaring away unsuspecting people trying to sit on him. Finally, Wapol snaps and starts eating the entire town for dessert, which results in his arrest.
Wapol, meanwhile, escapes arrest and ends up in a dump with a dog that constantly pees on him. Wapol tries to make money by selling matches, but nobody wants to get near him. Wapol ends up eating broken toys under a bridge, completely destitute, with nothing left of his former life as a king. However, while munching on the junk, he ends up using his Baku Baku Factory technique to create combined junk toys. The island children love Wapol's new toy creations, so Wapol starts selling them for a profit. Wapol's toy booth booms in popularity, and quickly expands.
One of the children brings his new toy and shows it to his scientist father, who discovers that the toy is made out of an unidentified, powerful alloy. Wapol was then thrust into the limelight for this invention, which he dubbed "Wapometal." He managed to become rich enough to build his own toy shop, and then an entire factory, and even an entire conglomerate. He then married a beautiful woman by name of Kinderella. With her and his new pet, Hakowan, at his side, Wapol has become more rich and powerful than he ever was as a king.
The Rebirth of Terrible Power!! Wapol's Insignia Stretches to All Corners of the World (Chapter 262)
Gallery
I Do Not Die, Even When Killed
I Eat a Tree
I Eat a Lamp
I Eat a Bench
The Town is My Snack, Whenever I Want
Arrested Despite My Kingly Status
King Dalton of the Sakura Kingdom
My Great, Tearful Escape
I Am No King Anymore
The Little Match Wapol
Me, Under the Bridge
Baku Baku Factory!! I Play in the Dump by the River
My Toys Have Captured the Hearts of These Children
Using Toys to Make my Daily Pittance
My 'Wapol Toy Shop' is Opened
My Business is Booming
A Local Scientist Discovers the Secret of Wapol's Toys
Discovery!! The New Alloy, Wapolium
Bigger and Better! Toy Shop Wapol
Baku Baku Factory, the Giant Corporation
The Upstart 'Wapol Conglomerate'
I Marry Miss Universe
The Rebirth of Terrible Power!! Wapol's Insignia Stretches to All Corners of the World
Aftermath
During the timeskip, Wapol and his wife founded their own kingdom. In addition, during the time skip, Franky was able to use Wapometal to advance his own technology. Perona acquired one of Wapol's toys and had Hogback create a zombie based off of it.
Trivia
This is the fourth cover story to be animated. It is also the first to be told in a flashback and the first to be seen after the timeskip.
The part where Dalton is seen as king isn't shown in the anime.
In the anime, Wapol suggested having his tale of climbing back up the social ladder be published as "Wapol's Great Memoirs".