Round 1: H2H, no handheld weapons, random encounter.
Round 2: H2H, no handheld weapons, 10-minute prep for each.
Round 3: Hellboy has a machine gun and large knife; Data has his phaser (cannot be set to the 'vaporize' setting). 10-minute prep for each.
Round 4: Arm wrestling.
No morals, the two begin 200 feet from each other in an abandoned mall. Rest between rounds.