Dcubed
Paratroopa
Doesn't Kirby and the Forgotten Land use Unity for the cutscenes or something? So its not the first time a nintendo game has used that engine for at least something.
Correct. HAL used Unity to make the FMV cutscenes in particular. All of the real-time content (including the real-time cutscenes) run on HAL's internal engine however.
Unity is actually quite commonly used for movie production these days; where real-time performance is less important.