Rage Mario Game is absolute Peak

Bowser is totally Clever

https://youtu.be/VTB2xj6aC-o

Touhou 95: Mushroom Kingdom Alpha 5.1

and Secret Level Discover

https://youtu.be/qY0cR4cIBYk

Mario's all alone

Fear alone cannot harm you... but it can lead you astray

SMW Horror Rom Hack by: GamesInTweed

https://youtu.be/6UWx1g5dYWo

Touhou EoSD in 3D is quite more challenging bullet hell game than 2D

https://youtu.be/ZVD8ZMEQ8hI

SMW: Lost Iggy's Castle is return

https://www.smwcentral.net/?p=section&a=details&id=41037

Mario ended up in the Bonus Rooms

(Some sort of Backrooms in SMW)

https://youtu.be/T0RYACm3nCs

Evil SM64

You Must Obey for Her!

Mario 64 in TF2

Red Plumber in the Base!

https://youtu.be/jkf-46aJ3Cg

Getting Over it with Plumber

Rage Mario Climbing Game

https://youtu.be/7_EjYgWevv0

And I'm gonna play original game as well

Retro Mario Runner Game on Android have played for old time and later play on Bluestacks

https://youtu.be/gqJqVJVWnZ8