He is actually a stronger Rogue.
Common Pigs (Appears in large numbers.)
Common pigs appear in large numbers and don't have special rules usually.
Hint: Deal with the tallest pigs first. They pose the most threat.
First, protect Red with Chuck's secondary skill so that every time the Rogue Boss attacks Red, both Red and the Rogue Boss will take damage. Then attack and force him to attack Red. After protecting Red, keep attacking until he is out of health.
Rogue Boss can deal higher damage than a normal Rogue, so take hint of the HP you have remaining.