"What better way is there to spend your treasure than on gold-plated armor? The Ornate Plate is the most expensive armor Shovel Knight can buy, even though it's functionally useless. Wearing it allows Shovel Knight to perform acrobatic flip jumps, however."
― Ornate Plate's Trophy Description.
The Ornate Plate skin is the most expensive skin in the game, costing 7777 coins. An user named Mail was the first player to unlock this skin. This price is likely a reference to seven being a lucky number, with the term Lucky 7's referring to the jackpot on a classic slot machine.
Despite the trophy's description, the outfit does not allow Shovel Knight to perform acrobatic flips whenever he jumps.