The company that co-developed and published Yo-kai Watch Dance: Just Dance Special Version was Level-5.
Released for Wii U in Japan on December 5, 2015, the game was a collaboration between Level-5’s Yo-kai Watch franchise and Ubisoft’s Just Dance series. Level-5 handled the publishing, while development involved Level-5 and Ubisoft teams, making the company a distinctive answer to both parts of the question.
The game uses Just Dance-style motion gameplay but replaces the usual broad pop-song lineup with music and characters from Yo-kai Watch. Players follow dances performed by Yo-kai Watch characters, and the title includes series-specific elements such as Yo-kai Badges and a Crank-a-kai-style unlocking system.
Ubisoft was involved in development, which can cause confusion about the publisher. However, the game’s publisher was Level-5, not Ubisoft, Nintendo, Capcom, or Square Enix. Nintendo’s role was tied to the Wii U platform and Japanese distribution context, rather than being the company identified as the game’s co-developer and publisher.