>>47152915well actually, looking at it, rhydon is way too light to swim properly, it'd just be able to float, without being able to go underwater.
the density of a beach ball is actually 0.1g/cm3, just like rhydon.
you know when you'd try to push a beach ball under the water as a kid and it would take an insane amount of effort and just end up bouncing back up into the air? theoretically, the exact same thing would happen with rhydon.