Dobee is a giant flying whale. He can attack by spouting blue orbs from his blowhole, as well as shooting red orbs from his mouth toward you. The random nature of his blowhole attack can result in the player taking some damage that may seem rather unavoidable, as dozens of them will litter the room. Also Dobee sometimes spawns Lecters from his blowhole.
It is possible to hide beneath Dobee and shoot him from below, he cannot hit you when you are underneath him. Just beware the lecters that he spawns.
When first introduced, players thought of Dobee as more of a joke than a boss. However, in the updates that followed, players mentioned that he seemed much more difficult. Although developers said they'd never altered Dobee's files.