Given one of the influences for Spark being Megamind from the Megamind series (others being Dr. Doofensmirtz from "Phineas and Ferb" and Dr. Eggman from the Sonic the Hedgehog series) it's honestly a given that Spark has his own version of Megamind's Black Mamba outfit. ... Awkwardly for Spark though, he doesn't really like wearing this nowadays due to its link to his villainous past... But awkwardly has to wear it when he needs to wear something formal. ... It's tragically his only formal outfit in his wardrobe. (A unique medic version of his Steampunk Robo Eevee Minions is also shown on this reference.)