Royal Drum Crown 7-Shot Bliking Cannon

The Royal Drum Crown 7-Shot Bliking Cannon is Wapol's ultimate weapon. It is capable of shooting 7 powerful shots.

History
Wapol was going to use it to defeat Monkey D. Luffy but he could not get the thing working due to the over-freeze condition and the cannon holes becoming a nest for Snow Birds.

In the ninth movie, Wapol ate the cannon, along with his older brother, Musshuru, and merged with them, with the intention to use the cannon to fire his brother's poisonous spores in the form of its ultimate attack, the Fatal Bomb, to wipe out the entire population of Drum Island. The bomb was fired, but was sliced open by Roronoa Zoro and the spores burned by Franky before it could affect anyone.

Translation and Dub Issues
The cannon has a different name in each of the English versions. It is called the Royal Drum Crown 7-Shot Tin Tyrant Cannon in the Viz Manga, the Drum Island Mega Monster 7 Barrel Super Shot in the 4Kids dub, and the Devastatingly Lethal Tin Titan Royal Crown 7 Barrel Cannon in the FUNimation dub.

Trivia

 * In the manga and anime, the cannon has seven barrels, as the name suggested. In the movie, however, it only has one.