So, this is Diglett, a Pokémon you can catch in Pokémon Go.

Niantic / Via pastemagazine.com
If you haven't noticed, Diglett has a somewhat phallic shape.

Niantic / Via pocketgamer.co.uk
Naturally, Pokémon Go players have begun to take advantage of that fact.
Excuse me #pokemonGO
Yes, Diglett dick pics are now a thing.
This Diglett is soo hard to capture.. #PokemonGo
It's a meme that's going to be hard to get rid of.
#PokemonGo A wild Diglett appears...
They're popping up all over the place.
Me encontré un diglett
Some Digletts are different sizes than others, and that's OK.
It's really about how you use your Diglett.
Careful, though, as Diglett might pop up at an inopportune time.

reddit.com
There's already even a subreddit dedicated to NSFW Pokémon Go pics.