Ludacris is first seen in Def Jam Vandetta when he challenges the player to a fight. The Player emerges victorious with Ludacris lossing. Ludacris is not seen in the game anymore. Ludacris is part of D-Mob's crew in this game.
Ludacris also appears in Def Jam Fight for NY. He seems to stay loyal to D-Mob. The player has to fight him when you betray D-Mob's crew.
His personality seems to be hot head since he will challenge you to a fight in both fights.