Motobaro

Motobaro (モトバロ) is the pet bison of Duval. He is used by Duval as a steed, and can also swim in water.

Appearance
Motobaro is a very large bison, with relatively small limbs and short horns in contrast with his big head and body. Typically, Motobaro is ridden by Duval with a special saddle. Aside from the side pockets where Duval's harpoon cartridges can be stored on it, there are motorcycle handle bars similar to those worn by the flying fish of Duval's men. With these, Duval rides Motobaro as if he's riding a large motorcycle. When traversing across water, Motobaro is fitted with a special breathing apparatus that resembles the front of truck with two exhaust pipes at the side.

In the anime, to increase his speed, Franky build and put on Motobaro a sort of engine.

Abilities and Powers
Because of his strength, Motobaro is called a brutal beast who is capable of tearing holes even in village dams with his horns, which people call them the Heart-smashing Horns (心臓破りの角). They were the reason that Duval was able to escape the Marines. He is so strong that he is still capable of breaking straight out of a cage and crushing an opponent even if his horns do not reach them.

Sabaody Archipelago Arc
When Motobaro went against Monkey D. Luffy, Luffy told him that there is no point in them fighting. Motobaro became terrified after Luffy unconsciously released his Haki, and tried to run away. He did not get very far before losing consciousness and falling to the ground with his mouth foaming. This is similar to how the Sea King ran away from Shanks and to how the junior members of Whitebeard's crew reacted to Shanks' presence on the Moby Dick.

Afterwards, he came with the rest of the riders to thank Sanji for Duval's "face surgery". When Sanji called in the rest of the Rosy Life Riders, Motobaro, with Duval and Sanji on his back, headed to Grove 1. Later, when leaving Grove 1, Franky made a apparatus that made Motobaro move faster.