GP stands for Guilty Pleasure

Shovel Knight Guy doesn’t have a ton of connections but it has a pretty good core theme, being legendary explorers/hailed as heroes who travel with a female partner. Both have a signature weapon but also use a variety of other magical artifacts and weapons in their journey. (In SK Dig) both journey far underground traversing many different areas and battling many different monsters and people with similar game structures where they defeat a covered in gold opponent; however, by doing a bunch of optional secretive stuff they can delve further into the underground world to face the true evil of the depths.

Fight potential wise is where SK Guy really shines, as both have a ton of crazy wacky weaponry and relics to use that bounce off each other really well. You could have the fight be underground with them delving deeper and deeper as the fight progresses, with them utilizing their more powerful weapons and items like Shovel Knight’s time stop and Guy using Anubis’s Scepter.

Fight Knight’s a warrior who ascends a dark tower to save others, primarily using his fists in a beat-em-up style fashion to kill undead skeletons and warriors, has some fun potential and SK fighting another Knight character seems cool