Holy

Holy (ホーリー Hōrī) is a huge, pale yellow dog that Ohm taught to box and stand on two feet. Ohm often tends to ride him around while traveling and fighting. Holy is very loyal to Ohm, and is a powerful fighter who, oddly enough, knows martial arts.

However, he isn't particularly smart, and will obey almost anyone: when Holy suddenly attacked Zoro, Zoro instinctively yelled the order "stay," which it did. Realizing it would obey him, he then told Holy to "hit yourself on the head and take a little nap", and Holy did just that, thereby defeating himself.