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...your name goes to ten, mine goes to a billion!

– Billy bragging to Ben.[1]

William Theodore "Billy" Billions[2] is a recurring villain in Ben 10. He is the rich, spoiled rival of Ben Tennyson.


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Billy has brown eyes, tanned skin and black hair. He wears a red-violet tux and a pink bow tie, a tux with gold buttons at the end of his black sleeves, gold pockets, a white shirt under his tuxedo, a gold medal, and black shorts.

Occasional Appearances[]


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What do you want me to say? That I'm sorry? That I did all this because I didn't have a normal upbringing? That I hide my feelings with money because I'm actually jealous of you and your family? And that all I've ever wanted is to have some-some true friends who won't just like me for my money?

– Billy apologizing to Team Tennyson.[3]

Billy is virtually identical personality wise to his original counterpart. The only key difference is Billy's arrogance comes from his obsession with getting everything he wants.

However, it is revealed that he just wants friends that don't just like him for his money. He befriended Ben and Gwen, but after the Forgeti made them forget, Billy doesn't remember and returns to his old ways.

In Roundabout: Part 2, Billy shows a more sadistic, power-hungry, and murderous side to his personality, conveying that he desires to be Forever Knight's main assistant and hoping to please him by killing Phil Billings.


Ben 10[]

Billy first appears in Rustbucket RIP. He is seen driving his vehicle from the back seat towards the store where the Platinum Card is. However, XLR8 buys the card before him, much for Billy's anger. In response, Billy steals the Rustbucket, but Wildvine chases him. He is ultimately defeated by Heatblast and grounded by his parents. After getting only a half of the card, Billy swears revenge on Ben.

In Don't Laze Me, Bro, Mr. Billions rented out Lazer Town for the whole day for Billy's birthday. Ben and Gwen were planning to go to Lazer Town that day, so they decided to challenge Billy and his "friends" to a laser tag duel. It turned out that Billy's "friends" were actually robots that Mr. Billions owned. Ben used his alien powers in an attempt to beat Billy while Billy used his robots. Billy was being extremely rude to his robots, making them rise against all humans, and the robots set their lasers to disintegrate. Billy and Gwen used Billy's presents (that were made of real gold) to deflect the lasers, while Ben used Diamondhead to target the lazers to all the robots. The laser tag duel ended in a tie.

In Battle at Biggie Box, Ben, Gwen, and Grandpa Max head to the Biggie Box for a big sale, and Ben yearns to get The Sumo Slammers Mojo Dojo Playset. Billy Billions then arrives on the scene with the same intention. Ben Transforms into Cannonbolt to compete against Billy, only for Simon Sez to arrive and get the playset despite the fact that he doesn't like Sumo Slammers. Ben and Billy motivate Simon to give one of them the set, only for Simon to go into robot mode and cause havoc, with the hunt for the Sumo Slammers chase continuing. Ben transforms into Omni-Enhanced Wildvine to save the store and Simon assists him. Billy gets the set, only to get his Biggie Box membership suspended due to his behavior, and the Sumo Slammers sets goes into the vault. He then throws a temper tantrum in defeat while being carried out of the store.

In Ben Again and Again, Billy plans to put his face on Mount Rushmore, however he runs into Ben. Billy shoots Ben's (as XLR8) Omnitrix. The impact created a ripple in space, sending them both through a time portal. Billy soon figures out that they've gone back in time, on the day Ben discovered the Omnitrix. He plans to get the Omnitrix before Ben does. Soon Ben, and a Gwen from the past, runs into Billy. Billy puts on the Omnitrix, and transforms into Four Arms. Billy chases them, but is lead to Vilgax's Drones, and attacked. Soon he jumps through a portal. The three kids continue to jump through different portals, until Gwen figures out how to fix the problem in the timeline. After past Ben is given the Omnitrix, Billy is erased from that timeline. In the future, from before they time traveled, Ben fights Billy using Four Arms.

In Billy Bajillions, he used a machine to cover a forest in fake snow. He runs into Ben, and has a contest with him, skiing down a mountain. Soon, Billy catches Ben (who's Diamondhead). He plans to make him his toy. The Forgeti arrives, and Billy tries to capture him. Soon, Ben and the Forgeti teams up, and Billy's fake snow is gone. Billy walks up the Tennysons. Ben asks him if there is something he'd like to say. Billy confesses, revealing that he did all of this because he didn't have a normal upbringing, and that he had his feeling with money because he's actually jealous of Ben and his family, and that all he's ever wanted was to have some true friends who won't just like him for his money. Max offers Billy to join them at the campsite. Billy accepts. Ben states that this might be the start of a new friendship. The Forgeti's fog appears. Billy attempts to take a picture of the Forgeti, however he had the camera on reverse, taking a picture of him, Ben, and Gwen. The four are then confused on where they are. Gwen asks Billy what he's doing there, however Billy states that it's a rich people fashion, and that they wouldn't understand. Max offers Billy a ride home, but Billy is grossed out by the thought. He turns his phone on to call a helicopter, however he spots the picture he took. In confusion, he deletes it.

In Prey or Play, he began working with Forever Knight. He was given tickets to a highly exclusive Adrenaland Park on a private island, where admission is extremely limited. Billy later attacks Ben at the park. The two chase each other around the park. Billy soon catches Ben, and is angered at the long chase around the park. However, Max and Gwen comes in and saves Ben, causing Billy's workers to quit since they aren't getting paid. Billy is saddened. He questions how Ben manages to beat him, even when he has everything. Ben explains to him that he had more fun sharing the park with Billy. They offer for Billy to join them, once more. Billy thinks about it, and refuses, discussed by the thought of joining the Tennysons.

In Roundabout, he appears on Forever Knight's team. He is there to offer security using his drones. He is soon instructed to take out the Tennyson family. He and Simon face off against Phil, Phil however manages to get Simon on his side, and Billy Billions is taken down. Later he and Charmcaster are taken into custody by the Tennysons.

Powers and Abilities[]


When the timeline was changed, Billy had access to the Omnitrix.[1]

With a pad, Billy can control a limousine with spider-like legs and multiple weapons. He also can send fireproof robots that, however, are vulnerable to water.


Billy is heavily reliant on technology to battle Ben's alien forms, possessing only the normal body of a ten-year old. Disabling his technology, separating him from it or even turning it against him diminishes his threat level significantly.


Ben 10[]

Season 1[]

Season 2[]

Season 3[]

Video Games[]

Billy in Minecraft

Billy in Minecraft

Minecraft: Ben 10[]

Billy is a boss in the game.


  • Billy has an ice sculpture collection.[4]
  • Billy loves gold.[5]
  • Billy's favorite colors are gold[5] and green.[6]


Vilgax DronesWarbot
Fulmini High Override
Weatherheads Hail-OShock-OGust-OSunnyWeatherhead Prime
Aloysius Animo NapoleonMadcowBoxerWolfen SheepSlurpstackTeramiteGround Hawg GangGilMutant BatAntitrix AnimalsQuetzalcoatl
Forever Knight Forever Knight's Guards
LaGrange Malachi SistersDirty Dobs
Magic HexCharmcasterOgreThe ThatIce ScreamerGolem of AyashaElementals
Steam Smythe AristocrowMechanoidsClocktopusConductobotSteambucketSteam CannonboltSteam XLR8
Zombozo FrightwigAcid BreathThumbskullClowns
Bugg Brothers MauriceSydneyMagg-O-Net MonsterInfestoidsCharlemange
Billions Billy BillionsMr. BillionsMrs. BillionsBilly's ButlerBilly's Robots
Lord Decibel BassTreble
Bounty Hunters Tetrax ShardKraabSixSix
Null Void Opticoid PrisonerEctonurite PrisonerPiscciss Volann PrisonerVulpimancer PrisonerLoboan Prisoner
In-Universe Media XingoQueen GriefensteinShadow Storm Ninja Shogun Warrior PrincessCyber Slammer
Recurring Villains Dr. PangFoggKing KoilNanny NightmareQueen BeeTim BuktuPolar TwainSolar Twain
Other Villains Anthony RoachisanoBartholomewBoblinsBreaker One-NineBug GangCarlEvil BenGladiator HornetGround Hawg GangHydromanderIron KyleJackalopeKarlKomodo DragonL.I.Z.A.Michael MorningstarNanny Nightmare's HenchmenVNM-3 SpecimenVilgax (Evil Ben's Dimension)XergeYawk
Dragons Docile DragonSapphire Dragon
Tri-Chefta Molecular ChefSamurai ChefSkewer Chef
Crossover Strike