here are Mario games that should be made:

Mega Mario(wii), (Giga Bowser as main villian)

Waluigi Pinball(ds), (best pinball game ever)

Super Luigi(wii), (he can jump over mountains)

Super Wario brothers(ds),

Birdo's island(ds), (Wario saves Waluigi)

Super Mario RPG 2(wii)

Baby Mario Brothers(ds)

Yoshi's island Wii(wii)

Super Donkey Kong(wii)