In the intro to Shovel Knight: Shovel of Hope, Shovel Knight is introduced as an adventurer who worked well with his partner, Shield Knight. On one of the pairs' adventures, they ventured into the Tower of Fate, where a cursed amulet unleashed an evil power, causing Shovel Knight to get knocked out. When he awoke, the tower was sealed, and Shield Knight was nowhere to be seen. This caused Shovel Knight to lose his spirit of adventure, and enter a life of solitude. During this time, the Enchantress rose to power, and had a legion of enemies referred to as the Order of No Quarter under her command. The tower became unsealed, and Shovel Knight left his life of solitude to return peace to the world.
As an Assist Trophy
Shovel Knight appears as an Assist Trophy. He digs the ground using his shovel, sometimes pulling up items, and can also dig opponents or fling dirt at them. He also uses his Shovel Drop ability to hop on opponents. He can also be KO'd to earn a point.