Hi. idk why I'm writing this, only I see a lot of people who want Dunsparce to evolve, but don't know too much about the pokémon, which causes some.....questionable ideas; I want to clear things up.

The truth is, Dunsparce is not some random derpy thing that the designers threw together. It's origin is just something that us Westerners are completely unfamiliar with. But there is logic behind its looks and general behaviour.

Dunsparce is based on the (see image,) Tsuchinoko, which long story short is Japan's version of Bigfoot. It doesn't exist, (probably,) and there's always a stream of false sightings and fabricated evidence, like how Americans fake Bigfoot footprints.

The Tsuchinoko is also called a bachi hebi -- Literally "bee snake". That's why Dunsparce looks like some weird cross between a bee and a snake. See image for why they gave it a drill-tail, too.

The whole thing about constant sightings and fabricated evidence is why Dunsparce is rare, even having sparce in the name, and why its dex entries say it flees as soon as it sees people. But that rarity is also its gimmick, and the entire reason it exists.

Let me put it this way: suppose they designed a Pokémon after Bigfoot. What would expect of it? You'd probably anticipate it to be some hairy, agile, and most importantly very powerful, enormous ape. Like Slaking, but even stronger and more mysterious.

Now imagine they made it suck.

That's what Dunsparce is; its existence was meant to be a bit of a joke, thus the other half of its name, "dunce". You expect it to be something amazing, because of how rare it is, and how much everyone always hypes it up, but when you yourself finally succeed in catching one....Turns out all that hype was for nothing.

It's a life lesson; that 'rare' does not necessarily mean 'good'. Fans loved it anyway though, which just teaches another life lesson about how pokémon don't have to be good in battle to be loved.