Here's the stats. It's 0.75 for invincibility.

That is true, thank you. I've also found that if you use Luigi on the Tanooki Kart, you trade off 0.25 accel and MT and a bigger hitbox for 0.25 in every speed stat and weight and 0.5 invincibility.

I found another good combo:

You can also use Inkling Girl, but it has a lower speed and a higher accel and handling.

I was messing around on https://mk8dxbuilder.com/ and found that Inkling Boy, Master Cycle Zero, Roller, and Paper Glider might be as good as or better than Yoshi Teddybuggy. Here's a screenshot and you can go check it out yourself: