I can really see that Yoshi Island inspiration! But my mind also went to Master of Disguise as a first impression.
I'm really loving all these costumes they are giving to the characters lately for the sport games. They remind me of the Mario Party 2 in a way. Could be cool to get a new one where you can customize them a bit.
(Response edit):
Yeah, I think it's the attitude of the drawing that reminds me more of it, rather than the treatment of the lines, so it could be interesting if you ever tried to replicate that as well! I also could never get into this game because it felt slow compared to Wario Land. If I remember right, both the gameplay and the story made too many interruptions.