- Wicked Executives, a group composed by powerful, humanoid Yo-kai ranked S, which are the first Yo-kai in this tribe listed in the Yo-kai Medallium, found after the Legendary Yo-kai and before the Local Yo-kai.
- Wicked Servants, a group of Classic Yo-kai, controlled by Wicked creatures, appearing similar to their normal counterparts, with the difference being their darker color scheme and a purple foggy mask with red eyes in their faces. All Classic Yo-kai below Rank A have been promoted 1 Rank above their original rank.
- A third group of Wicked Yo-Kai which are not registered in the Yo-kai Medallium and cannot be befriended. They are also responsible for putting the Classic Yo-kai under Dedtime's control and turning them into Wicked Servants.
Although the player can get their Yo-kai Medals complete with their own summoning song in the Yo-kai Watch Model Zero, they are unusable in battle until Yo-kai Watch 2: Psychic Specters; after purifying Dame Dedtime, the player can find them and then befriend the Wicked Executives around different buildings of Springdale. In addition to using the Wicked Executives, the player can "evolve" Classic Yo-kai into their Wicked Servant counterparts by combining them with the Wicked Parts.
In Yo-kai Watch 3, the Wicked tribe no longer have a unique summoning song in the Dream Watch, instead, they share the same summoning song as Boss Medals.
- Yo-kai Watch Model Zero
- Unlike the previously established tribes with the Yo-kai Watch Model Zero, which are replaced with instrumental versions of their original summoning chants, the Wicked have their own summoning chat.
In the games and when playing with the toys, their chant when held at the 1 position is: "Kaima, Kaima! Did you call us now? For real now!?" (Japanese: カーイマカーイマ！呼んだカーイマ？本当カーイマ！？ Kāima Kāima! Yonda kā ima? Hontō kā ima!?)  with Latin Jazz-themed music.
Wicked, sticked! Who's calling Wicked? Icked, Wicked!
- Yo-kai Watch U
In the anime and when playing with the toys, their chant is: "Kaima, Kaima! Ka-i-maaaaaaaaa~! (Japanese: カイマ！カイマ！カーイマー！ Kaima! Kaima! Kāimā!).
- Yo-kai Watch Dream
In the anime and when playing with the toys, their chant is: "The strongest, the worst! Why are you crying?! (Japanese: 最強！最悪！何が出てきても泣けてくる～！ Saikyō! Saiaku! Nani ga dete kite mo naketekuru~!). This is shared with Boss Yo-kai.
List of Wicked Yo-kai
|Mad Kappa||Water||Chinese Food|
Other Wicked Yo-kai
In Other Languages
- Italian: Tribù Spettrale
- German: Fiesa (Stamm)