Shovel Knight is a character in The Air Ride Series.
When it comes to Smash Bros, Shovel Knight always tries to get into King K Rool's way. He says everyone should vote for him, and once even declared himself King Shovel Knight, having stolen K Rool's crown.
Ever since Bayonetta was introduced, Shovel Knight stopped making appearances in the series, or at least the episodes Poyo has in his mind that aren't actually made. He made like 1 appearance in the real comics, and that was after Bayonetta was introduced.