Poliwag.
Its newly grown legs prevent it from running. It appears to prefer swimming than trying to stand.
Transcript
0:00What if I told you the cute little swirl on Poliwag's belly isn't a pattern.
0:03You've been looking at its insides your whole life.
0:06This is Poliwag.
0:10And that swirl is one of the most recognizable marks in all of Pokémon.
0:13It's on the plushies, it's on the cards, kids have been doodling it for thirty years.
0:16And the Pokédex is completely upfront about what it actually is.
0:19Poliwag's skin is so thin and so damp that its internal organs show right through it.
0:23That swirl is its coiled up insides, visible through its belly.
0:26The Pokémon Crystal version even adds this: the swirl looks clearer after it eats.
0:29Because of course it does...
0:32You're watching lunch travel!
0:35And somehow the details keep going.
0:39That paper-thin skin is also incredibly flexible, so flexible that sharp fangs bounce right off it.
0:42The swirl even spins in different directions depending on where the Poliwag lives, and the games say the equator is thought to have something to do with it, like bathwater draining on opposite sides of the world.
0:45There are entries saying true Poliwag fans can tell where one grew up just by glancing at its belly.
0:48And if the swirl ever looks white instead of black, that means the little guy's sick, so its belly is also a health monitor.
0:51Now here's the part that flips this from gross to kind of beautiful.
0:55None of that is made up creature design, it's actually based on real tadpole biology!
0:58Actual tadpoles have skin so transparent you can see their coiled intestines right through their bellies.
1:01And the man who created Pokémon, Satoshi Tajiri, spent his whole childhood catching exactly those creatures in the ponds and streams outside Tokyo.
1:04It's literally the reason this entire franchise exists, one kid who loved collecting little pond creatures and bugs grew up and turned it into a game.
1:08And when they ask him his favorite Pokémon out of all of them, the man doesn't say a legendary.
1:11He says Poliwag!
1:14So that swirl you've been looking at since you were a kid is the single most honest detail in the entire game.
1:17It's a real childhood memory, drawn straight onto the screen, guts and all.
1:20So where do you land in the comments?
1:24Does knowing what the swirl really is make Poliwag better, or did it just ruin the plushie for you?
1:27And drop the other innocent-looking Pokémon detail that turned out darker than anyone expected.
Speed 90, Sp. Defense 40. Pick your poison.
Poliwag's base stat total is 300. The shape of a stat spread tells you everything about a Pokémon's role. Tanks lean defense, sweepers lean speed and attack.