Tyler Dalton is one of the pre-made downtownies in The Sims 2: Nightlife. He can be made playable by befriending and asking him to move in, or by marrying him. Tyler's career is randomized at the start of the game, and he is mainly interested in Environment, Food, Weather, Sports, and Entertainment.
Tyler's name is randomized when Downtown is generated. The name "Tyler Dalton" is only referenced in the game files. According to his SimDNA in SimPE, his hair was red before it turned grey.