Has imcdb.org able to cover these The biggest oddballs ever made in the car world?

Alfa Romeo SZ - yes, 4 of them (2 animated, 1 Top Gear)
AMC Pacer - yes, lots
Aston Martin Cygnet - yes 5 (4 in car shows)
Audi A2 - yes, lots
Austin Healey Sprite - yes
Bentley Bentayga - yes
BMW i3 - yes
BMW Z1 - yes
Bugatti Royale - none under that name
Chevrolet SSR - yes
Chrysler Crossfire - yes
Chrysler PT Cruiser - yes
Citroën C3 Pluriel - yes
Citroën C6 - yes (I saw one recently, cool looking car)
Citroën DS - yes
Ferrari FF- yes
Fiat 500 TwinAir - Don't see any listed under this name
Fiat Multipa - yes
Ford Consul Classic - yes
Ford Model T - yes
Ford Thunderbird - yes
Honda Insight - yes
Hyundai Velostar -yes
Isuzu VehiCROSS - yes
Lamborghini LM002 - yes
Lincoln Blackwood -yes, only a handful
Lotus Europa - yes
Matra Djet - yes, only a handful, no films since 1971
Matra Rancho - yes
Mercedes A-Class - yes
Mercedes G 63 AMG 6x6 - I can't find any, however I suspect some are
Mercedes Vaneo - yes
MINI Clubvan - none I can see
Nash Metropolitan - yes
Nissan Cube - yes
Peugeot 1007 - yes
Pontiac Aztec - yes
Renault Avantime - yes
Renault Twingo - yes
Renault Twizy - yes
Renault Vel Satis - yes
smart fortwo - yes
SsangYong Rodius - yes
Suzuki Jimny - yes
Toyota Previa - yes
Toyota Yaris Verso - yes
VW Phaeton - yes
VW Polo Harlequin - found a couple.

Good job on the hard work

The Bugatti is listed:
http://imcdb.org/vehicles.php?make=Bugatti&model=Type+41+Royale&modelMatch=1&modelInclModel=- on

The Fiat is listed in Extra Info:
http://imcdb.org/vehicles.php?resultsStyle=asImages&yearFrom=2000&yearTo=2022&makeMatch=- 2&make=fiat&modelMatch=0&model=twin&modelInclChassis=on&modelInclExtra=on&mk=&origin=- &madein=&madefor=&role=

The G-wagen 6x6:
http://imcdb.org/vehicles_make-Mercedes-Benz_model-G+63+AMG+6x6.html

Didn't find any MINI Clubvans, just older models.

The only Harlequin I found was a Golf:
http://imcdb.org/vehicles.php?resultsStyle=asImages&yearFrom=&yearTo=&makeMatch=- 2&make=vw&modelMatch=0&model=harlequin&modelInclModel=on&modelInclChassis=on&modelInclExtra=- on&mk=&origin=&madein=&madefor=&role=

I do question some of these choices. The Ford Model T or Thunderbird, but no EXP? For Fiat, they only list a 500 model, and none of the strange looking vehicles they made over the years (looking at you Multipla!)

For the Polo - it isn't spelt how you think - https://www.imcdb.org/vehicle.php?id=1012136
https://www.imcdb.org/vehicle.php?id=1407193
https://www.imcdb.org/vehicle.php?id=1555634
https://www.imcdb.org/vehicle.php?id=1561926

So just the new Mini Clubvan then?