Korin is an 800-year old cat who lives at the top of a tower just underneath Kami's Lookout. He is a wise martial arts master, revered as the Keeper of the Sacred Water and grower of the strength-restoring senzu beans. However, he also has a wicked sense of humour - the "Sacred Water" is just tap water with arduous exercises built around it.
In the Harmony Gold dub of Mystical Adventure, Korin (or, rather, "Whiskers") is voiced by Ted Lehmann.
In Z's Ocean dub, he was voiced by Paul Dobson during the Saiyan Saga, with Ted Cole taking over from the Cell Saga onwards. When the production moved to Blue Water studios, Roger Rhodes would take over for Korin's appearances in Dragon Ball.
For FUNimation's in-house dub, he was initially voiced by Mark Britten, with Chris Sabat taking over permanently following Britten's departure.
For the AB Groupe dub of the various movies, the role is handled by Sharon Mann for Mystical Adventure and Paul Bandey for Cooler's Revenge.
For the Creative Products dub of Cooler's Revenge, he is voiced by Filipino actor Raymond Buyco.