The Galactic Enforcers
From Wikitrix
The Galactic Enforcers are a group of alien super heroes who act as law enforcement for the universe. Three of them appear in the episode "The Galactic Enforcers" (presumably, many more would be needed for such an organization to be effective).
After arriving on Earth to arrest Sixsix and Volcanus, Ultimos grants Ben an honorary membership in their organization, the Omnitrix making him a hero by proxy. Tini develops a crush on Ben after first seeing him, Ben having inadvertently timed his transformation into Fourarms with their arrival. He makes it a point to avoid the form afterwards, despite Tini's insistence. This in turn brewed up jealously in Synaptak, who is in love with Tini. Ben, however, is perceptive enough to catch onto this and goads Synaptak into revealing his feelings for Tini, granting both their wishes.
The three appear again in "Ben 10,000", where future Ben's near-perfect policing of the entire planet leaves them basically without a job, being forced to ferry Ben's captured criminals to prison instead. After future Ben is "reformed" by his past self, he tells them to handle the Neuvo Circus Freaks in his stead.
Ultimos
The Specimen Prime — The leader of his team, Ultimos is a Superman pastiche, complete with the same powers. His attitude is an ultra-strict copy of Superman, as well, as he follows the Galactic Code of Conduct too much to the letter. Earth chocolate is poisonous to his species (in essence, his kryptonite), causing his body to shrivel and turn brown.
Synaptak
Ostensibly the team scientist, Synaptak is a telekinetic, flying brain with an octopus-like lower body and a computerized face.
Tini
The muscle of the three, Tini is a female Tetramand, Fourarms' species, and hence has the same powers, as well as better mastery over them.