Name: Aoi Taihou (Blue cannon)
Description: Its a very large (at least 10 meters in full size) cannon with a blue whale decoration around the barrel.
It is made by titanium,except the point of the barrel which is made from Sea stone. There are some bottles of some sort attached on each side, behind the whale decoration. It also seems to have 2 "holes" for adding the fuel used for the blast.
Special abilities:
The Aoi Taihou uses Cola to fire powerful shots. One blast was enough to destroy an area of at least 100 meters in radius. It uses a barrel of Cola to fire. There appears to be a mechanism that cause a very bright light upon ignition that causes blindness on enemies. It can also be fueled with Sea Stone shards, though the exact process remains unknown so far. If fueled by Sea Stone (it still needs Cola to fire), the light turns blue and it can be assumed that the cannon will fire sea stone shards in a large area (to damage fruit users)
*During the Atlantian War, it was seen with some modifications, how it uses some energy from Boltman Dude's static Devil Fruit, and its Cola consumption is halved.
History: It was designed and built by the Black Cross Pirate's first mate and shipwring, Boltman Dude, with some help from his crewmate, Zuro. It was initially seen on Margaret Mamba, but it was somehow moved on Wally's new and currently unnamed ship.