Gambit (real name Remy LeBeau) is a thief from New Orleans and a member of the X-Men. He specializes in fighting with a staff and card throwing. He and Rogue are in a relationship.
Gambit was voiced by Chris Potter for the first few seasons of the 90's X-Men cartoon. Tony Daniels took over for the last season, and also voiced him for several fighting games. Since then, Gambit's voice actors have been more consistent, but he nonetheless has a lot.
Special thanks to Foxwolf for the X-Men: Next Dimension clip.