One thing they share in common are kitsune, werewolves, or other Japanese/American folkloric characters.
Pokemon - Vulpix line, Zorua line, Delphox*, Lycanroc, Charmander and other tons of unpopular dragons
Digimon - Renamon digivo line, Gabumon digivo line, Veemon digivo line
Yo-Kai Watch - Kyūbi, and others that are actually based on actual Yo-kai legends instead of made up monsters.
And off topic, Kishimoto pulled the same idea - Shukaku and Kurama