Immediately make the following to give to the man. If he loses the duel, you lose.
Set 1: Death Ray
Set 2: Laser Gun
Set 3: Rocket Launcher
Scribblenauts Remix 4-9 Cheats Hints gallery:
4-9-1-a: Only he can win the duel! Help him!
4-9-1-b: Give the cowboy a powerful weapon.
4-9-1-c: Quickly equip the cowboy with a Bazooka.