The credits misspell Sheriff Mason as "Sherriff" Mason.
Though a character appears in the credits as Heatblast, it's a misnomer. Heatblast is one of Ben's aliens from the Omnitrix in the original Ben 10 series, which Ben named. The flaming alien is from a species known as Pyronites. The Pyronite that appears is connected to the DNA from the character Alan Albright, who has not named him. Ben's team refers to him as the "guy (who) looks like Heatblast," but that does not mean it's his/its name.
After chasing Ben and Alan on foot through a corn field, Sherriff Mason takes only two seconds to turn up in an active car to chase Kevin.
Gwen wonders aloud why a sheriff would give his son a plumber's badge. There is good reason for presuming Alan's dad was a plumber but none for thinking he was also a policeman.