Which part did you find most 'unique'?

Probably because of the Undertale similarities.

It was both, and wonderful for it. It's the black sheep of the paper mario franchise, the grey area between the good games and the awful games

I feel like I should play Undertale sometime (Due to the similarities between the two games and due to the fact that I loved the story of SPM).

Do you think Super Mario Sunshine is more of a black sheep to the Mario series or would SPM be more of a black sheep?

Dance Dance Revolution: Mario Mix is probably the oddest of all.