Mr. Dayton was the Coolsonian Museum curator.
He is a short Caucasian male with curly gray hair, a 5 o'clock shadow and a mustache.
Appears to be very strict about what goes on, being the curator of the museum; especially when demanding to know if Mr. Thornsby found the swords. His true nature being greedy and selfish was uncovered when he was unmasked as the Samuri Ghost.
A Pup Named Scooby-Doo
He dressed up as the Samurai Ghost to steal the museum's swords, made it look like they were already stolen, and threatened to fire Mr. Thornsby if they were never recovered before his "vacation". It was revealed that he wanted to make a million bucks off the insurance policy of the swords for himself at some point when it also discovered he was really going on a one-way flight trip.
"I could have made a million bucks, if it weren't for those pesky kids and their pup!"
- - Mr. Dayton.