So the Turtles' Extra Ranger Casey Jones, as played by Elias Koteas, goes up against the Turtles' teen sidekick Keno, as played by Ernie Reyes, Jr!
(and both have been verbally threatened by Raph)
Round 1: No gear, but the fight takes place in the Foot Clan junkyard
Round 2: Casey gets his standard gear,* and the fight happens at night in Central Park
*We're not counting TMNT 4 since Casey leveled up in gear and experience