Boss Yo-kai

The primary Boss Yo-kai symbol.

Boss Yo-kai (Japanese: ボス妖怪, Bosu Yōkai) are powerful enemy Yo-kai which the player cannot befriend or recruit, and are typically stronger than most Yo-kai the player has met up to that point.

Most of the chapters in the Yo-kai Watch video games end with a battle with one of these bosses, and they are registered in the last few pages of the Yo-kai Medallium, just after the Legend Pages; however, they are not assigned any true Rank or Tribe, with the Boss symbol being in place of a Tribe's own.

Some Boss Yo-kai become befriendable in future games following their debut, giving them a Tribe and a Rank as well as a smaller, more compact form, which is not considered a Boss Yo-kai. Most bosses belong to the Shady tribe, Slippery tribe, Wicked tribe, Brave tribe or Tough tribe due to them being sneaky with evil or bad intentions or their high defensive and offensive powers. Also, almost all bosses have a negative Inspiritment effect.

List of Boss Yo-kai

Boss Yo-kai introduced in Yo-kai Watch

Boss Medal	Image	Name	Attribute Weakness
		Slimamander	Fire
		Sproink	Fire
		SV Snaggerjag	Water
		Massiface	Earth
		Phantasmurai	Wind
		Tarantutor	Lightning
		Dr. Maddiman	Drain
		McKraken	Drain
		McKraken (Second Form)	None
		Duwheel	Fire
		Chirpster	Wind
		Eyedra	Fire
		Hoggles	Fire
		Styx Mk.VI	Water
		Clipso	Earth
		Spooklunk	Wind
		Dr. Nogut	Drain
		Squisker	None
		Wobblewok	Earth
		Gargaros	Fire
		Ogralus	Water
		Orcanos	Drain

Boss Yo-kai introduced in Yo-kai Watch 2

Boss Medal	Image	Name	Attribute
		Gutsy Bones	Wind
		Meganyan	Wind
		Cap'n Crash	Water
		Eyeclone	WInd
		Kin	Earth, Lightning
		Gin	Water, Ice
		Dame Dedtime	Ice, Lightning
		Dame Demona	Unknown
		Hans Full	Unknown
		Eyephoon	Wind
		Mallice	Earth
		Cap'n Rex	Water
		Flippa	Unknown
		Floppa	Unknown
		Dame Dredful	Unknown
		Kat Kraydel	Unknown
		Goldy Bones	Unknown
		Glitzy Bones	Unknown
		Hans Galore	Unknown
		Retinado	Wind

Boss Yo-kai introduced in Yo-kai Watch 2: Psychic Specters

Boss Medal	Image	Name	Attribute
		Rubeus J	Fire
		Hardy Hound	Earth
		Hinozall	Lightning
		Bronzlow	Fire or Wind
		Teastroyer	Ice
		Infinipea
		Headasteam	Fire
		Kabuking	Lightning

Boss Yo-kai introduced in Yo-kai Watch Busters

Boss Medal	Image	Name	Attribute
		Tattleterror	Unknown
		Mass Mutterer	Unknown
		Whismellowman	Unknown
		Robonyan 28	Unknown
		Akamaneki	Unknown
		Shirokoma	Unknown

Boss Yo-kai introduced in Yo-kai Watch Busters: Moon Rabbit Team

Boss Medal	Image	Name	Attribute
		Captain Thunder	Unknown
		Captain Thunder (Serious Form)	Unknown
		Robonyan 3000	Unknown
		Inumaroderon	Unknown
		Nekokiyoperon	Unknown
		Zazel	Drain
		Dai-Yoma Nura-Neira	Unknown
		Akamaneki Gold	Unknown
		Shirokoma Gold	Unknown
		Hinozall Awoken	Unknown
		Shogun King	Unknown
		Pink Emperor	Unknown

Boss Yo-kai introduced in Yo-kai Sangokushi

Boss Medal	Image	Name	Attribute
		Noruka	Fire
		Soruka	Ice
		Norukasoruka	Unknown
		Maou Koi	Unknown
		Mao Shibu	Unknown

Boss Yo-kai introduced in Yo-kai Watch 3

Boss Medal	Image	Name	Attribute
		Junkernaut	Unknown
		Supermanager	Unknown
		Moso Monmon (Dreamlighter)	Unknown
		Injaneno	Unknown
		Ma Injaneno	Unknown
		Slackerjack	Unknown
		Gamegosu	Water
		Yopple-Bot	Lighting
		Warubo V5	Fire
		Beddy-Byes	Ice
		Kaminarasu Goro	Lightning
		Gogogo Godfather	Unknown
		Kuso Yumemigachino	Unknown
		Kaito Darumanto	Unknown
		Darubeemabee	Fire
		Tsudzura Chun Daruma	Wind
		I Jigen Tochan	Wind
		Geboru Fushi-cho	Unknown
		Bishagatsuku	Earth
		Tsunodaruma	Unknown
		Suwa Daruma Shisho	Unknown
		Oni King	Unknown

Boss Yo-kai introduced in Yo-kai Watch 3: Sukiyaki

Boss Medal	Image	Name	Attribute
		Yellskitchen	Unknown
		Maiden Ruin	Unknown
		Chronomen	Unknown
		Gogogo Treasure Dragon	Unknown
		Narwail	Unknown
		Whaleman	Unknown
		Sangeki	Unknown
		Anahorimoguzou	Unknown
		Last Bushi-ou	Unknown
		Golden T	Unknown

Boss Yo-kai introduced in Yo-kai Watch Busters 2

Boss Medal	Image	Name	Attribute
		Chi Ma Tree	Unknown
		BaiKING	Unknown
		Miiror Ball	Unknown
		Kanibouzu	Unknown
		Orifalcon	Unknown
		WaNEWdou	Unknown
		Dark Master	Unknown
		Sasurai no Billy	Unknown
		Gowin	Unknown
		Kanaendesu	Unknown
		Majin Banbarayar	Unknown
		Yodersen	Unknown
		Zircondor	Unknown

Medals

With the release of Yo-kai Watch Busters and the release of the DX Yo-kai Watch U Prototype, the Yo-kai bosses featured in the game were given B-medals. Like the other B-medals, their medals are black-framed, and their artwork features the Bosses in action.

However, there are some differences. Their medals don't play the traditional summoning music of any of the Yo-kai Tribes when inserted into the DX Yo-kai Watch U, but merely an ominous electric guitar. In addition, Boss Yo-kai Medals do not have any tribe-affiliated insignias on them; rather, they have a slash going through them.

Boss Yo-kai that have B Medals

Trivia

In Yo-kai Watch 3, the bosses are no longer given numbers that continue from the befriendable/normal Yo-kai Medallium number. Instead, the Boss Yo-kai numbering restarts the numbering system, and adds a B for Boss in prefix form to the number.
Despite befriendable bosses like Slimamander or SV Snaggerjag gaining friendlier-looking forms, their medals still showcase their boss forms, indicating that all Boss Yo-kai have regular Yo-kai Medals that are simply unseen and never granted to the player.

In other languages

Italian: Mostri Yo-Kai