In Super Mario Maker 2, while one might expect there to be some events that could wake up a Koopa sleeping at the wheel of a Koopa Troopa Car, absolutely nothing except Mario approaching it will wake it up. Below is a montage of the Koopa sleeping through various events.

I like the implication that the sound effect could have done something

The Super Mario Maker games are full of surprising interactions, so one could actually expect something like this to be affected by sound effects as an Easter egg, though I added it mostly for the sake of covering all cases! Thank you very much for your inquiry!

*Bombs blowing up in front of me* I sleep *the sounds of an Italian man stepping on grass* real shit

Crash bandicoot 1 when you miss a lot of crates:

What if *it* approaches Mario through the means of a conveyor belt? Would it still wake up from that if it gets close enough, even if Mario doesn't move? Because if that's the case then that would just be ridiculous

It is purely proximity-based; as such, it does not matter how Mario and the Koopa approach each other. The Koopa could be pushed towards Mario or even fall onto him and still wake up! Thank you very much for your inquiry!

Every car in front of me when the light turns green

Bro think he him

Me and my assorted alarm clocks