Thundermutt Is a Character Who Appears In "Top Dog" And "K-9 Krusader".
An egotistical canine actor, Thundermutt was at first jealous of Krypto and was recruited to help Snooky capture the Superdog. But the canine thespian had a change of heart and helped Krypto escape. Despite his flaws, he seems to be mostly good at heart. He is voiced by Phil Hayes.