Daily Yo-kai Watch Factsさんのイラストまとめ

Libertynyan is based off of Jibanyan from his NYCC'15 medal. Strangely, Libertynyan is of the Heartful tribe, not the Charming tribe like the medal he's based off of.

Nozuchika Mitsumatagi's Yo-kai Hero, The Viper, bares a striking resemblance to Sly, who he is also the indirect reincarnation of.

Kuro Gashado is a boy that can be seen at the Capsule Machine Club in Y School Heroes: Bustlin' School Life. He is the reincarnation of Gutsy Bones, whose Japanese name is "Gashadokuro".

Dober Vader is based off of the "Star Wars" villain, Darth Vader.

Rinne speaks using formal speech (such as "desu" and "shou") in all of his appearances, even in the Y School Heroes manga.

Mimikin is a Yo-kai that was exclusive to the American version of Yo-kai Watch Wibble Wobble, and in turn the "Wib Wob Me" app does not exist in any other version.

Kagamine Rin and Kagamine Len (characters from "Hatsune Miku: PROJECT DIVA") have their very own cover of "Yo-kai Exercise No. 1", arranged by Giga-P, one of Vocaloid's producers.

Submitted by @swift_uhm

Supernyan is based off of Superman, and his counterpart, Kaped Komander, is based off of Batman.

Mangetsuotoko is the reincarnation of Ray O'Light, and instead of a sun is a full moon.

Yo-kai from the Dragon Slayer Puni Puni series are seen to commonly wield a variant of the Yo-kai Watch called the "Dragon Watch", despite also being Yo-kai themselves.