First I start with items.

Here are some new and old items that should be in the game and the place あなた would get it.
* 火災, 火 花 (Limit: 10 sec.)5-7
* Super Leaf 1-6
* バナナ 1-3
* Blooper 5-8
* Boomerang 花 - use the wii controler to flick a boomerang at the people in front または behind あなた (Time Limit: 10 seconds) 8-10
* Boo 7-10
* Bob-bomb 4-6
* Bullet Bill 8-10
* Ice 花 (same thing as 火災, 火 花 but freezes people for 3 seconds. Limit: 10 sec.) 7-9
* Green Shell 1-4
* ゴールド Shell (gives あなた speed. After ten 秒 it explodes.) 7-10
* Golden キノコ 9-11
* Red Shell 2-4
* P-Wing (takes あなた straight to 秒 place) 10-12
* Rock キノコ (like SMG2) 10-12
* キノコ 1-6
* Spiny Shell 8-10
* 星, つ星 9-11

So there's the items!

There should be 12 racers on each track.

Retro tracks:
4 tracks from MK7
4 tracks from MKW
2 tracks from MK64
2 tracks from MKDD
2 tracks from MKDS
1 track from SNES
1 track from GBA

Banana
Wii Moo Moo Meadows
SNES Ghost Valley 1
N64 Toad's Turnpike
3DS 音楽 Park

Shell
Wii Toad's Factory
DS Cheep Cheep Beach
GCN Sherbet Land
3DS Neo Bowser City

Leaf
Wii DK Summit
GCN キノコ City
DS Tick Tock Clock
3DS Pirahna Plant Slide


Lightning
N64 Yoshi Valley
3DS Rosalina's Ice World
Wii Dry Dry Ruins
GBA Ribbon Road

150cc Mirror unlockable
N64 虹 Road

See ya 次 time!