Kenny cheated during this episode, but with Spenny knowing full well he would cheat, as Kenny told him and dropped countless hints. Spenny failed to catch Kenny cheating.
Prior to the competition, Kenny visited the owner of the boat and paid him off, so the following day he would take Spenny to an area with no fish, and could to go through with his plan. During this trip, Kenny had filmed himself catching the dead fish.
Later on during the actual competition, Kenny pushed Spenny into the lake, ordering Steve the captain to drive away, and left Spenny in the water for 30 minutes. Afterwards, the boat drove back and retrieved Spenny and Kenny showed him the tape made beforehand of him catching the fish.
It is worth noting the only actual fish caught in the 'spirit of the competition', was the day before when Spenny caught one.
18th Dec 2006 / Season 3 Episode 10
Prior to the competition, Kenny visited the owner of the boat and paid him off to go to an area with no fish, and to go through with his plan. Also during his trip, Kenny had filmed himself catching a dead fish. Later on during the actual competition, Kenny pushed Spenny into the lake, drove away, and left him for 30 minutes. Afterwards, the boat drove back and retrieved Spenny and Kenny showed him the tape made beforehand of him catching the fish.