Legendary Yo-kai

are a select group of powerful Yo-kai that can only be befriended after filling out the Legend Pages in the Yo-kai Medallium by collecting certain sets of Yo-kai Medals, with each seal requiring a different set of 8 Yo-kai Medals. Every Yo-kai in this group is S-ranked, and each one represents one of the eight main tribes. Once unsealed, though, these Yo-kai will start off at Lv. 1.

Five of these Yo-kai were introduced in the first Yo-kai Watch video game, representing the Brave, Mysterious, Heartful, Eerie, and Tough classes.
 * In Yo-kai Watch 2: Ganso and Honke, three more Legendary Yo-kai representing the Charming, Shady and Slippery classes were introduced, completing the set of eight.


 * Also Yo-kai Watch 2, nearly all of the required Yo-kai Medal sets for the pre-existing Legendary Yo-kai, except for Gilgaros', has been changed to a certain degree.


 * In Yo-kai Watch 3, a new category of Legendary Yo-kai are introduced, noted as the Great Legend Yo-kai.

Summoning Chant
Legendary Yo-kai, despite falling to a pre-established tribe, have an unique summoning chant which plays instead of the regular ones. In the anime and when playing with the toys, their chant is: (レジェーンド!レジェーンド!ブッタマゲーンドー! Rejēndo! Rejēndo! Buttamagēndō!), which roughly translates to: "Legend! Legend! Amazing!".

The ENG lyrics are: "Imaginary Incendiary Flip flop Squiggleboom slim slam Legendary!"

Trivia

 * Without resorting to exploits in the first game, Shogunyan is the only Legendary Yo-kai that can only be obtained during the course of the main story, with the others having at least one Yo-kai who can be obtained post-game. Gilgaros is the exemption, due to how all Yo-kai needed to summon him are S-ranked Crank-a-kai-exclusive Yo-kai, and thusly relies on luck.
 * Komashura has Kyubi.
 * Elder Bloom has Dromp and Castelius Max (though the needed Platinum Bar to evolve Castelius I can be obtained before post-game via a completed Yo-kai Cam challenge or the Golden Egg event).
 * Dandoodle has Everfore and Insomni.
 * Dandoodle in the anime is the cheapest Legendary Yo-kai ever summoned, requiring 6 Yo-kai Medals to summon him rather than the traditional 8.
 * The first five Legendary Yo-kai's required Yo-kai Medals in the first game are all arranged to form into distinctive patterns.
 * Shogunyan & Gilgaros: One Medal for each Yo-kai tribe.
 * Komashura: Two Medals from the Charming, Brave, Mysterious, and Tough tribe, with the later four done in reverse order. Incidentally, both of the Charming Medals are of the Koma-inu family.
 * Elder Bloom: Two Medals from the Heartful, Slippery, Shady, and Tough tribes. Unlike Komashura, the order is preserved for the later four Medals.
 * Dandoodle: All Medals are from the Eerie tribe.