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{{Infobox character|image = [[File:075.PNG|250px]]|first = [[A Perfect Match]]|voiced by = Kiyotaka Furushima (Japanese)<br />Bailey Stocker (English)|age = 12 ([[Bakugan Battle Brawlers|BB]])<br />15 ([[Bakugan Battle Brawlers: New Vestroia|NV]])|gender = Male|race = Human|status = Alive|faction = [[Battle Brawlers]]<br />[[Bakugan Battle Brawlers Resistance]]|attribute = Subterra|guardian = [[Cycloid]]

{{nihongo|'''Billy Gilbert'''|ビリー・ギルバート|Birî Girubâto}} is a [[Subterra]] brawler in the anime ''[[Bakugan Battle Brawlers]]''. His Guardian Bakugan is [[Cycloid]].

He is childhood friends with [[Julie Makimoto]] and was the [[The Top Brawlers|top tenth brawler]] in the world at the start of the season. Like several of the other top-ranked brawlers, he was brainwashed into becoming [[Naga]]'s servant and opposes the [[Battle Brawlers]] until he is freed from Naga's control. Afterwards, he joins the Battle Brawlers in opposing Naga.

He makes a brief appearance in ''[[Bakugan Battle Brawlers: New Vestroia]]'', brawling against [[Ace Grit]] along with Julie.

===Bakugan Battle Brawlers===[[File:Julie_Billy_Kids.jpg|thumb|150px|left|Billy and Julie as children]]Billy debuts as a Subterra player together with Julie, where he defeated Julie with his Cycloid. He was later defeated in a rematch by Julie's [[Gorem]].

He becomes the top tenth brawler in the world before he becomes one of Masquerade's henchmen, when he's exposed to the [[Silent Core]]. He reappears as [[Masquerade]]'s henchman, along with [[Komba O'Charlie]], and battles Julie and [[Shun Kazami]]. Although he loses, he isn't freed from the mind-control. As Masquerade's henchman, the others often make fun of him since he is the only one in double-digits and is lower-ranked than the rest of them.

Later, when Julie attempts to bring him back to his senses with a battle, he nearly sends Julie and Gorem to the [[Doom Dimension]], but after seeing the toy he had given her when they were young, he still defeats her but right before Gorem is sent to the Doom Dimension he takes out the [[Doom Card]]. He is then freed from Naga's control and Billy explains to the Brawlers how he first met [[Naga]].

During Masquerade's quest to strengthen [[Hydranoid]], Cycloid is sent to the Doom Dimension. However, Cycloid (along with the other Top Brawlers' Bakugan) is later freed and reunites with Billy.

He agrees to help everyone stop Naga's minions, and slows [[Rabeeder]]'s approach on the city though he couldn't completely stop her. He returns to help Julie and [[Nene]] fight [[Tricloid]]. Afterwards, he and Julie start dating.

===Bakugan Battle Brawlers: New Vestroia===[[File:1587979089.jpg|thumb|150px|Billy and Julie]]Billy is first mentioned when Julie says that he was traveling the world to learn from famous athletes, and he was currently living in [[wikipedia:Spain|Spain]]. He is later mentioned to have moved to [[wikipedia:Africa|Africa]] to build schools,<ref>''NV'' episode 10: [[Surprise Visitor]]</ref> and finally appears in-person when the [[Vexos]] are hunting down the [[Bakugan Battle Brawlers Resistance|Resistance]] for the [[Attribute Energies]]. He and Julie tag-team against [[Ace Grit|Ace]], but are easily defeated. Billy's surprise visit, however, had an unexpected side-effect: it led [[Mylene Farrow]] and [[Shadow Prove]] right to the brawlers' hide-out.<ref>''NV'' episode 37: [[Virtual Insanity]]</ref>

*[[Subterra]] [[Cycloid]] ([[Guardian Bakugan]])*Subterra [[Wormquake]]*Subterra [[Hynoid]]*Subterra [[Tuskor]]*Subterra [[Rattleoid]]*Subterra [[Centipoid]]*Subterra [[Manion]]*Subterra [[Mantris]]*Subterra [[Terrorclaw]]*Subterra [[Saurus]]

* Billy calls Julie ''BakuBabe'', which seems to annoy her.* His hat resembles Ash Ketchum's Indigo League Expo hat, which Ash wore in the first five seasons of the Pokémon anime.

==Brawling Record=={| class="wikitable" width="60%"! colspan="2" style="color: white; background-color:#EA4135;"|Bakugan Battle Brawlers

! Opponent! width="20%"|Outcome

| Julie Makimoto || Win

| Julie Makimoto || Lose

| [[Klaus von Hertzon]]/[[Julio Santana]]/[[Chan Lee]]/[[Komba O'Charlie]]|| No Outcome

| Shun Kazami and Julie Makimoto (Tag with [[Komba O'Charlie|Komba]]) || Lose

| Julie Makimoto || Win

| Masquerade || Lose

| Rabeeder || Lose

| Tricloid (Tag with Julie and Nene) || Win

|[[Centorrior]] and [[Druman]] (Tag with [[Dan Kuso|Dan]], [[Marucho Marukura|Marucho]], [[Runo Misaki|Runo]], Julie, Klaus, Julio, and Komba) || Win

{| class="wikitable" width="60%"! colspan="2" style="background-color:#90D664;"|Bakugan: Battle Brawlers: New Vestroia

| [[Ace Grit]] (Tag with Julie)| width="20%"|Lose

{{BB main characters}}{{NV main characters}}

[[Category:The Top Ten]]

[[Category:Battle Brawlers]][[Category:Bakugan Battle Brawlers]][[Category:Secondary Characters]][[Category:Bakugan: New Vestroia]][[Category:Subterra Users]][[Category:Former Villains]]