Knuxonia

Knuxonia is the het ship between Knuckles the Echidna and Sonia the Hedgehog from the Sonic the Hedgehog fandom.

Canon
The pairing only appears in the Sonic Underground series.

At first, Knuckles was tricked into thinking that Sonia was his enemy, although he eventually found out the truth. Knuckles developed a crush on Sonia. Eventually Knuckles and Sonia developed a crush on each other and Sonia kissed Knuckles on the cheek.

Fanon
Knuxonia has some popularity and it is possibly the most popular ship for Sonia.

Fandom
AO3

DeviantArt
 * knuxonia tag on DeviantArt
 * knucklesxsonia tag on DeviantArt
 * soniaxknuckles tag on DeviantArt
 * ForAllKnuxoniaLovers fanclub on DeviantArt
 * Knuxonia-Manally fanclub on DeviantArt