He is a heavy man with dark red designs painted on his face and body.
He does not seem particularly bright.
Scooby-Doo! And The Samurai Sword
The men and the dog were going to be stewed alive (and maybe eaten) as an offering to the Green Dragon, while the women were going to be married against their wills to the chief.
When he noticed the women looking at him with horror, he sniffed under his arm to see if he might smell bad. Shaggy Rogers and Scooby-Doo worked some of their enemy-confusing double-talk magic and tricked him and his top men into getting into the stew pot instead of them. While he and his people were thus distracted, Velma Dinkley called their hover plane by remote control to get them out of there. The chief and the other tribesman were highly impressed with this "magic."
Oddly, in the end, some of the islanders and the chief were somehow invited to the ceremony honoring the victory of the gang, where a giant statue of Scooby-Doo was unveiled. (This is not the way one would expect one to treat would-be murderers, and cannibals, that one barely escaped from, so there must have been some sort of reconciliation).