Vigor moves back and forth across the arena. He has four attacks - he will charge the player, often changing his speed while doing so, he will call on the crowd to bombard the player with fruit, he will throw his trident forward, and he will throw his boomerang which arcs out and flies back to him. His attacks are all telegraphed and easily avoided - when he turns to the crowd and they cheer, they're about to throw things; when he stops and runs in place, he's about to charge; and when he stops and raises his arm, he's about to throw one of his weapons. In short, when Vigor stops moving, expect an incoming attack.
Vigor is virtually impenetrable when attacked from the front; his chariot will absorb the blow and he'll take very little damage. The key is to attack him from behind, where he takes proper damage. Winning this fight without a weapon level 2 will be extremely difficult. A charged Horn Spear is optimal for this, as it is difficult to get close to Vigor to strike with melee blows with how he constantly moves about. As long as the player can get behind him quickly enough to throw their spear before he runs off out of hit range, the player should not have much trouble.
Vigor is the only boss (not including mini-bosses) where the dog isn't there to help the player. The boss fight with Verminator also renders the dog useless, but he can help split the damage of incoming spells.
After Vigor is defeated, the player receives 1,050 experience points, 1,000 jewels, and the best prize of all, the Gladiator Sword.
The announcer will provide a description of the boy and his weapon, depending on which weapon type he has currently equipped. The Bone Crusher has the message: "some loser with a femur!". The Spider's Claw has the message: "some loser with a claw!". The Horn Spear has the message: "some loser with a stick!". The message does not depend on the actual weapon the player is wearing, so even if the player has the Laser Lance, the message would be the same like that of the Horn Spear.
If the player has the Bazooka equipped, the announcer will not give any description of the boy and no text box will appear. This is only possible by cheating.