The Yo-kai tribe that includes ghosts and spooky types is the Eerie Tribe. In the English version of Yo-kai Watch, Eerie is the tribe associated with creepy, unsettling, or frightening Yo-kai and is represented by a distinctive eye symbol.
Eerie is one of the original tribes in the first Yo-kai Watch games. Its members are not all literal ghosts; the category is broader, grouping Yo-kai whose appearances, personalities, or powers are meant to feel eerie or disturbing. Tattletell, for example, is an Eerie Yo-kai despite looking more like a small ghostly girl than a traditional monster.
The tribe is also associated with abilities that weaken or inconvenience opponents through inspiriting. That gameplay role helps distinguish Eerie from neighboring tribes: Heartful Yo-kai generally specialize in healing, Shady Yo-kai use tricks and debuffs, and Mysterious Yo-kai focus more on techniques and magic. Thus, “ghosts and spooky types” is a fair summary of Eerie, even though the tribe includes several different designs.