Knuxamy

Knuxamy is the het ship between Knuckles and Amy from the Sonic the Hedgehog fandom.

Games
Knuckles and Amy do not have a direct interaction in Sonic Adventure. In Sonic Adventure 2, Knuckles popped out of a manhole where Amy and Tails are hiding. Amy tries to pull Knuckles up the manhole but no avail.

In Sonic Lost World, Amy and Knuckles look after the small animals that Dr. Eggman didn't capture as they reassure them that Sonic and Tails will save their captured friends. Amy has faith in their friends while Knuckles brags on how he can do things far better than Sonic. Amy and Knuckles' lives were later placed in danger when their world was being drained of its life force, luckily Sonic and Tails were able to return the stolen life energy and regroups with the two.

In Sonic Generations, they were present on Sonic's birthday party before they were captured by the Time Eater. After they were saved hours later, Amy and Knuckles cheered on the Sonics as they prepare to battle the Time Eater. With Time Eater and the Eggmen defeated, the two enjoyed the rest of the party with their friends, once Knuckles recovered from Amy knocking him into a tree.

In Sonic Forces, both are members of the underground Resistance, and fought together against Infinite.

IDW Publishing comics
Knuckles and Amy were at the Resistance base when Neo Metal Sonic took control of Angel Island and the Master Emerald.

Sonic Boom
In the Mirror Dimension of the Sonic Boom World, their mirror counterparts are shown to be close, with Mirror Knuckles filtering with Mirror Amy by saying that he knew she'll fall for him when he saved her, while Mirror Amy is place in a love like trance. Indicating that their relationship is similar to the one that Boom Amy has with Sonic. Boom Amy and Knuckles meet Mirror Knuckles when he gets transported to their dimension, to keep themselves from confusing their Knuckles with his mirror counterpart they give Mirror Knuckles a hat to wear. As they work on away to send him back home, since his presences is affecting Boom Knuckles.

In "Battle of the Boy Bands", Amy was one of many Justin Beaver fangirls, which in reality is a mind-control experiment by Dixon. Knuckles tries to tell Amy the discovery he made with Sonic and Tails but she wouldn't him. She attended a Justin Beaver concert in which Knuckles' band, Dreamboat Express, challenged him to a sing-off. Amy and the other fangirls were freed after Sonic used a counter-frequency on them, then cheered on Knuckles' band under a new name, Dude-itude.

In "Fire in a Crowded Workshop", Tails went inside his smoking workshop and saw Knuckles, Amy, Sonic, and Perci covered in soot. Sonic explains that Knuckles caused the fire and fought with Amy over a pillow. Knuckles disagrees, then told his own exaggerated version: when meeting Perci, she fell under his charm alongside Amy. When they reached Tails' workshop, he offered the bandicoot a pillow but Amy snatched it, asserting her role as a medic. Sonic and Amy fought over the pillow, then suddenly the workshop catches on fire. Knuckles uses his ice-breath to extinguish the fire, to the affection of Perci. He blamed Amy for starting the fire by tossing the activated heating pad on the newspapers, but Amy disagreed with his version of the story. She told them her own version of the story, with both Sonic and Knuckles having obvious interest in Perci. Aggravated by the contradicting points of view, Perci told her own version of the story that Sonic, Knuckles, and Amy were equally fretting over the accident. Tails revealed to them that accident was caused by his new security system that should have gone off. Feeling resolved for Tails' negligence, Knuckles, Amy, and Sonic went out to Meh Burger for some lunch.

Sonic Boom

 * In "Two Good to Be True", Knuckles is the leader of Team Sonic in the Mirror Dimension. He heroically catches the Amy of his counterpart after Dr. Eggman shot a blast at her.

Fanon
Knuxamy may not be as popular as Sonamy, Shadamy, or Knuxouge, it still has a few faithful followers who support the ship.

As of October 2020, this ship has seven fan works on AO3, while FanFiction.Net has 391 with only 4 placed under paring in its Sonic the Hedgehog category and 15 in its Sonic Boom category. Along with Knuxamy having a reasonable size fanbase on DeviantArt and Tumblr.

Fandom
FAN FICTION
 * Amy/Knckles (game) tag on FanFiction.Net
 * Amy/Knckles (Boom) tag on FanFiction.Net
 * Amy/Knckles (Boom) tag on FanFiction.Net

DEVIANTART

PIXIV

TUMBLR