Leonardo carried one double bladed Katana instead of two. His sibling rivalry with Raphael drove many episodes. Leonardo still retains his position as the leader, and it has been important to the plot of many episodes of this short-lived and ill-received series. He is the one who reveals to Venus de Milo that the Turtles in this incarnation were not blood relatives.
In promotional materials, Leonardo's headband was yellow. This may have been to further distance his color from Venus' cyan, but ultimately did not make it into the show.
