Robson

Robson (ロブソン Robuson) is Wapol's pet who is a White Walkie, aka Wooly Hippo. Wapol killed other of his brothers and was very unhappy with him. Wapol rides him as his personal transport, he was able to to take him up the Drum Rockies. During the fight between Luffy and Wapol, Robson was knocked into the sky when Wapol crashed into him after being hit by a combo attack by Luffy and Sanji. He was never seen again. In the ninth movie, he is shown to have crashed back down in a snowbank on Drum Island.