You're probably unfamiliar with the Honda Brio, and that's fine. The small hatchback, which is smaller than the Fit/Jazz, is exclusively sold in Southeast Asia and has gained popularity in these countries as a sporty looking city runabout. The Brio is decent to drive, quite responsive to throttle inputs, and can actually put bigger cars to shame when handled by a crazy driver. I know because I own one, a second-generation model, which was based on the Honda Small RS Concept from 2018.
However, I am not aware that this tiny hatchback can do so much more with a "little" tweaking. A first-generation Honda Brio, owned by Jonathan Jameson from Indonesia, has been featured by YouTuber Larry Chen, and it packs quite a serious punch.