Nygmobblepot

Nygmobblepot is the slash ship between Oswald Cobblepot and Edward Nygma from Gotham.

Season 1
Oswald walked into the GCPD looking for Jim Gordon. While there he noticed that Ed was watching him, although was trying to be subtle about it. He began to walk around the police station, Ed very noticably following him. He stops at the front desk confronting Ed on what he wants. Instead of answering, Ed gives Oswald a riddle. Oswald becomes confused, and Ed asks if he likes Riddles, Oswald says no. Ed answers the riddle himself, “Nothing” being the answer. Not wanting the explanation for the riddle, Oswald asks who he is. Ed introduces himself, and says he knows who Oswald is. Oswald tells him he’s standing too close, and Ed takes a step back. He continues to annoy Oswald, who in turn tells him to go away. Ed smiles, then leaves.

Fanon
Many shipped this pairing even before the two had met, but fics slowly became more common after the first scene together in season 1, but wasn't as popular as it's rival ship Gobblepot. Shipping between the two became more popular during season 2 when they shared more screen time, and became the most popular ship in the fandom during season 3.

Fics range from future fics, about their time when Bruce Wayne becomes Batman, as well as missing scenes. Many also like the idea of them running Gotham together as a mob boss couple. Fix it fics also became popular during season 3, where the events of the season drastically changed their relationship.

One AO3 the ship is the most written for both characters, as well as the most written in the Gotham tag.

Fandom
AO3