Ben 10/Sonic the Hedgehog: Animated Crossover part 2

Manny Armstrong is a Plumber and an ally of Ben's Team. He was previously part of the Amalgam Kids and the Plumbers' Helpers.

Helen Wheels is a Human/Kineceleran hybrid and Pierce's adopted sister, as well as Manny's partner.

Mighty the Armadillo is a character that appears in the Sonic the Hedgehog series. He is a peaceful anthropomorphic armadillo with a passion for traveling. Though he dislikes violence and roughness, Mighty is more than capable of such when trouble arises.

Ray the Flying Squirrel is a character that appears in the Sonic the Hedgehog series. He is an anthropomorphic flying squirrel who is Mighty the Armadillo's closest friend.

Nicole the Holo-Lynx is a character that appears in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. She is an artificial intelligence created by Dr. Ellidy which was entrusted to Sally Acorn as a portable hand-held computer and has since become both Sally's loyal friend and a trusted member of the Freedom Fighters.

Bunnie D'Coolette, birth name Bunnie Rabbot( pronounced rah-bow), is a fictional character in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. She is a mobian rabbit (though partially robotic), the wife of Antoine D'Coolette and a member of the Freedom Fighters.

Antoine D'Coolette is one of the main characters in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. He is an English/French-speaking mobian coyote, and a faithful and longtime member of the Freedom Fighters, serving as a part of the Team Fighters subdivision. He also is a skilled swordsman, as well as an active pilot.

Rotor the Walrus is a Mobian walrus and a key member of the Freedom Fighters, serving as one of their main inventors, usually working alongside fellow brilliant inventors Tails and Professor Charles the Hedgehog to create the best tech they can for their friends and allies.

Chaos, also known as "The God of Destruction" or the "Spirit of Water", is a character that appears in the Sonic the Hedgehog series. He is an immortal mutant Chao, the last of the Ancients and a godlike figure who serves as the guardian who was worshipped by the Knuckles Clan prior to their negative turn of events, as well as the Chao and their friends. His body is composed entirely of concentrated energy, and he has the ability to change form and evolve with each Chaos Emerald that he absorbs. 

Wave the Swallow is a fictional character from the Sonic the Hedgehog series. She is an anthropomorphic swallow who is the technical and mechanical expert of the current generation of Babylon Rogues.

Infinite, also known as the "Ultimate Mercenary", He is an anthropomorphic jackal and the former captain of the Jackal Squad mercenary group. During a raid, Infinite was hired by Dr. Eggman to become the leader of the Eggman Army, only for him and his squad to fall at the hands of Shadow the Hedgehog while protecting one of Eggman's facilities. Ashamed of his loss, Infinite decided to obtain the power of the Phantom Ruby not only as a means of becoming stronger, but also to abandon his "weak" past self.

Scourge the Hedgehog, formerly known as Anti-Sonic or Evil-Sonic, He was the Moebius counterpart of Sonic the Hedgehog, as well as the ruler of Moebius.

Hope, better known as Charmcaster, is a powerful magic user from Legerdomain.She is the niece and former apprentice of Hex.

Herbert J. Zomboni, known by the name of Zombozo, is one of Ben's first enemies. He is a cruel and creepy clown mastermind.

Frightwig was one of Zombozo's minions from the Circus Freak Trio. She is known for her powerful tentacles on her head, resembling hair.

Thumbskull is a minor recurring villain who is regularly accompanied by his teammates Frightwig and Acid Breath.

Kraab is a cybernetically-enhanced Piscciss Premann and was one of three alien bounty hunters sent by Vilgax to retrieve the Omnitrix from Ben Tennyson.

Joey, better known as Rojo, is the leader of a heavily-armed female biker gang who first appeared in The Alliance.

Ghostfreak is the Omnitrix's DNA sample of an Ectonurite from the planet Anur Phaetos in the Anur System.

Phillip "Phil" Billings was a corrupt Plumber, who was Max Tennyson's old partner and helped in defeating Vilgax for the first time in their Plumber careers. He is also the original user of the Nemetrix.

Sublimino is a short-tempered villain with a short stature and hypnotic powers and a former stage hypnotist.

This Forever King was originally a former Plumber named Sir Driscoll. However, he was thrown out of the Plumbers organization in disgrace when he was revealed to have been stealing alien tech only for his own benefit. He later joined the Forever Knights and worked his way up through the ranks, eventually forming a splinter group of knights with the desire to conquer the world and get revenge on the Plumbers.

Ultimate Albedo is the artificially evolved form of Albedo's Galvan DNA using the Ultimatrix.