Dr. Bubbles is always dressed in a white lab coat with tails, a light blue jumper underneath with a matching ascot, grey trousers and darker grey shoes. He also wears Alvin's traditional red cap.
Dr. Bubbles is a selfish and self-praising oceanographer who always takes all the credit for all the hard work his assistant Trusty does. He loves publicity, his main goal is to be rich and famous and he's determined to let nothing stand in his way. He is also shown to be lazy and unkind to Trusty, one such time is when he loses the mermaid he is searching for and sends Trusty to search for her instead of him.