Halloween Tour of 1 normal and 3 super characters are:

Baby Luigi(Normal)
Luigi(Super)
Waluigi(Super)
King Boo(Super)

And 2 High-End variation characters

Halloween Rosalina(Week 1 only)
Luigi's Mansion King Boo(Week 2 only)

3 retro tracks added

DS Luigi's Mansion
SNES Ghost Valley 1
DS Waluigi Pinball

More karts and gliders added

If you purchase the gold pass you will recieve Peachette requires 250 grand stars to collected

https://www.youtube.com/watch?v=mGvIDk4VBGY