Mario kart 9 characters and tracks ideas

Character combos ( if you will have partners)
Mario Luigi dk and diddy kong peach and daisy
Rosalind and Pauline toad (any color) Tourette
Yoshi and birdo (any color) baby Mario and baby Luigi
Locked combos
Baby birdo and baby yoshi
Baby peach and baby Daisy
Baby rosalina and baby Pauline (wierd)
Koopa troopa and paratroopa
King boo and petey piranha
(SUPER RARE) metal Mario and metal Luigi
LEGENDARY gold Mario and gold Luigi
Mega rare pink gold peach and pink gold daisy
Robot mario and robot Luigi
Bowser and browser Jr
Dry browser and dry browser jr (idea)
Link and zelda
Splitting boy and solution girl
Wario and waluigi

Items
Banana
3 shells (red or green)
1st place shell
Shell (red or green)
3 bananas
Fake item box
Pow.block (special)
3 shrooms
5 shrooms (special)
Bo bomb
Boo (special) new power puts a random curse on player
3 fake items (special)
5 bananas (special)
Bullet bill (special)
golden shroom (super special)
Fire.flower
Ice flower

Here is a better list
(Baby) Mario and (Baby) Luigi
(Baby) Peach and (Baby) daisy
(Baby) Rosalina and (Baby) Pauline
(Baby) Yoshi and (Baby) birdo
Gold / metal Mario and pink gold peach
Tanooki Mario and cat peach
Green bronze Luigi and ginger silver daisy
Gooigi and fire daisy
Toad and toadette
Wario and waluigi
Donkey kong and diddy kong
Funky kong and Dixie kong
Bowser and bowser jr
Koopa / paratroopa and hammer bro
Goomba and shy guy
Broodals and koopalings
Dry bowser and dry bones
Wiggler and honey queen
King boo and Petey piranha
Link and Zelda
Inkling and octoling

Retro tracks
Retro mushroom cup (my idea there will be a retro shell cup)
Gcn mushroom bridge (for a obvious reason)
3ds maka wuhu
Wii maple treeway
Wii coconut mall

If that is meant to be the first retro cup then it sucks
3 of the tracks have been remade before and the other is likely to be in lightning cup

A Railway Themed Track

@Lelyglow here is what I think of your retro tracks
Green means good
Teal means should move to a different cup
Blue means change location in cup
Orange means unlikely
Red means impossible

Shell Cup :

SNES Koopa Beach 1: this is because it’s too big of a cup jump, especially to start a cup. It may be easy but starting shell cup with a star cup track is too much
GBA Riverside Park: right difficulty and hasn’t been remade before
DS Desert Hills : already been remade and there are still multiple options for DS tracks
3DS Cheep Cheep Lagoon: right difficulty and hasn’t been remade before

Banana Cup :

N64 Mario Raceway: it’s been remade but since N64 has 1 track left, it makes sense. However, they would probably use a track remade in DS and also not put a flower cup track here, since this is used by star cup but mainly mushroom cup
GCN Luigi Circuit: already been remade and there are multiple GCN options
Wii Toad's Factory: challenging mushroom cup track that deserves to be here and hasn’t been remade
WiiU Toad Harbor: should be moved into track 3 of leaf cup since that normally holds flower cup tracks and this track overalls with the toads factory in this cup

Leaf Cup :
SNES Vanilla Lake 2: simple track that could do well with a remake, which it only had in mario kart tour
GBA Cheep Cheep Island: this is the worst out of your 3 GBA choices due to koopa beach 2 overlap and should be replaced with a WiiU track (in a different location)
DS DK Pass: already been remade and there still are options for DS tracks
Wii Koopa Cape: already been remade and there are still options for Wii tracks

Lightning Cup :

GCN Wario Colosseum: too similar to wario stadium.
N64 Wario Stadium Should start the cup, due to that being a common place for star cup tracks
3DS Maka Wuhu: follows the formula
GBA Rainbow Road: follows the formula

Better list while using your good tracks

Shell cup:
N64 Moo moo farm
GBA Riverside park
Wii Luigi circuit
3DS Cheep cheep lagoon

Banana cup:
DS Figure 8 circuit
SNES Koopa beach 2
Wii Toads factory
Wii U twisted mansion

Leaf cup:
SNES Vanilla lake 2
DS mario circuit
WiiU Toad harbour
GCN mushroom city

Lightning cup:
N64 Wario stadium
GCN Bowser castle
3DS Maka wuhu
GBA rainbow road

Star Cup track un the Shell Cup ? We had something similar with Spécial to Banana and Flower to Lightning.

yes but the track is still there, I just moved it to a better place. I would be fine with star cup to end with shell cup but not start. Also it overlapped with cheep cheep lagoon a bit.

Bruh you have not been genius here
Obviously KB2 would have been in Leaf or Banana but seriously learn how to read, I wrote KB1 and KB1 is super easy and it doesn't got any remake conteary to KB2

I know but it doesn’t fit as a mushroom cup starter track, and if it was in the 3rd position, then there would be 2 water tracks in a row.

Does it matter ?
Really ?

It does to me...
But then again, Nintendo is stupid