No. It make the world seem more "real". A world with with monsters that can sure elemental attacks and such. That world better not be sugar and rainbows. So I like the weird ones.
Thats true, it makes the universe real. And kids mainly catch the Pokemon and play with them. But when a child starts to go through the Pokedex entries at certain age and read everything, wouldnt that freak him/her out.
I think much of the Pokedex is just written by writers who just comes up with it out of thin air but its still weird if you see how real they want to make the game and how cheerful they are making the anime.