Yes: Cosmetic reskin of Spade cards changes the King, Queen and Jack to Shovel Knight characters.

Switch Only: The Switch version has Amiibo support and using a Shovel Knight Amiibo will spawn a companion that looks like Shovel Knight. Published by Yacht Club so buy it anyway lmao.

No (As of 07/09/2024): Only 1 Character has a shovel and they don't use it as a weapon. Subject to change as is game is Restricted Early Access.

NO WAY

Yes: Has a quest that explains the cameo. Gives players a Shovel Knight skin and shovel after quest completion. Recognised by Yacht Club Games.

No (As of 16/06/2024): Shovel Knight does not appear in this crossover fighting game. Unlikely to happen as he is not owned by Warner Brothers.

No: Despite shovels being used as weapons, no Shovel Knight references.

Yes: Shovel Knight's helmet briefly appears in a cutscene. Recognised by Yacht club games.

Yes: Shovel Knight is a playable character in all of his beefy glory. You can fight against him. Recognised by Yacht Club games.

No: Despite this game containing Shovels, various Knight like figures and a Plague Doctor, I could not find a direct reference. Shovels are just mere tools, which is also utter blasphemy.