A grinning light purple imp with green eyes and crescent-shaped horns. He has green slitted eyes, a purple nose, and goatee. He wears a red cape fastened around his neck, black gloves with gold rings around his arms, and black pants tucked into purple boots. He carries a gold pitchfork in his right hand. He has an appearance related to Beelzebold.
He can cause his targets to develop a cavity, and harm their teeth a lot.
Count Cavity can be freed from the Crank-a-kai with a Blue coin, Five-Star Coin or Special Coin, and he can be found in the Infinite Tunnel 7,000+ yards in. Additionally, he appears randomly after brushing your teeth.
As of the Oni Evolution Update, he can also be freed from the Happy-Go-Lucky Crank-a-kai.
Once again, Count Cavity can be found in the Crank-a-kai in Japan. He can be freed with a Blue Coin a 5-Star Coin, or a Special Coin. There's also a chance that he can be befriended at Cluphinx Raised Paw 4 in the Blasters T mode.
When Befriended (Yo-kai Watch Wibble Wobble):"Be my friend, or I'll make all your teeth fall out!"
"Mushiba-hakushaku" translates as "Count Cavity".
"Conde Caries" is translates as "Count Cavities".
In the anime
Warning: plot & spoiler details are listed below.
Count Cavity appears near the end of The High-Fright Zone, when it is revealed he was the cause of Nate's cavity and the subsequent trip to the dentist complete with all the terrors he got from a Blazion-possessed dentist way back in EP006. Upon realizing this, Nate smacks Whisper and Count Cavity with his paper fan because Nate thinks Count Cavity is a jerk and Whisper said that there was no Yo-kai who could cause cavities.
Spoilers end here.
When snapped in the Yo-kai Cam, his tip is, "You're a step away from a cavity. If you brush well, you'll be OK!"
County Cavity's "random" nicknames in Yo-kai Watch 2 are: Floss, Vlad, Hurtooth, and Doc Kay.