all of nintendo's most famous characters merged into one! and birdo

I don't want to fight against it as a boss *scared*
Unbeatable

Why does this game not exist?

Noish!

Not many people know this but, deep on the darkest parts of the internet, a secret game was published by the Big N with Yoshimarigirobirdukulinksamus as the main character.

Its project folder was massive, it combined elements from every game known in existence, had every dev from every team pulled off of their respective projects, all for the undertaking of working in collaboration in attempts to seamlessly merge the platforming with the FPS with the puzzle-solving with the multiplayer, all of which to work with the state-of-the-art motion controls while making it backwards-compatible with the latest Virtual Reality.

Sadly, the budget ran out in a mere three days and the dream was never realized.

Though to this day, in whispered awe and hushed tones of solemn reverence, fans occasionally come away after playing the unfinished demo with tears of joy in their eyes- having glimpsed the ultimate combination of all genres blended perfectly into one.
Gaming Nirvana.

Yoshimarigirobirdukulinksamus Party 12 was a shit-show.

Oh good, if you hadn't seen this, I was going
to note you about it, because I know how much
you like Birdo.

It looked so silly I couldn't help but giggle

Quite possibly the most epic thing the internet has seen conceived.