Depon Alex (Devlin in the English dub) is a one-time character featured in the episode Move Fast, Doraemon! The Galactic Grandprix. Known as the "Speed Cat", he is the winner of the previous race. Despite his will-be protagonistic role, Depon was framed by Bengal Ritchine who disrupt other racers' cars in order to get him disqualified.
Depon Alex is conceited and stubborn but not without a honorable side, he initially looked down on Doraemon due to the latter's lack of ears, and refused Doraemon and Nobita's offer for help during the race. In the end when Bengal Ritchine's treachery showed itself, he asked Doraemon and Nobita to show him the pride of cat-type robots. During the celebration for the winner of the race, he was shown congratulating the duo and he is now Doraemon‘s best friend.