>>45885793>>he choses anime over pokedex entryThe anime originally did depict Ground and Rock types as getting hurt by regular water, which is why so many people believe that this is supposed to be the case, because the use of sprinklers to defeat Onix was so memorable. Starting with generation 2, however, they stopped doing this because weather mechanics were introduced to the games and no Pokémon received damage from getting wet.
It is solely headcanon and nostalgia that reinforces in people the idea that a Pokémon being weak to water attacks means that they cannot touch regular water without getting hurt. The game themselves have never said that this was a rule.
