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{{Subterra Tabs}}{{Infobox character|image = [[File:Mason1.jpg|250px]]|first = [[Brawler To Be]]|voiced by = [[Daichi Endo]] (Japanese)<br />[[Julien Osen]] (English)|age = 17 ([[Gundalian Invaders]])|gender = Male|race = [[Gundalian]]|status = Alive|faction = [[Twelve Orders]] (Formerly)<br>[[Gundalian Agents]] (Formerly)<br>[[Battle Brawlers]]<br>[[Order of the Castle Knights]] (Formerly)|attribute = Subterra|guardian = [[Avior]]|color = orange|color text = brown

'''Mason Brown''', (Japanese version: {{nihongo|Bruce Brown|ブルース・ブラウン|Burusu Buraun}}) is a [[Subterra]] brawler from [[Gundalia]] and part of the [[Gundalian Agents]] in ''[[Bakugan: Gundalian Invaders]]''. His [[Guardian Bakugan]] is Subterra [[Avior]] and uses [[Lashor]] as his [[Battle Gear]].

Mason is a rather big showoff who holds no loyalty towards [[Barodius]], and is instead loyal to the Gundalian Elder [[Nurzak]]. He escapes the fate met by [[Lena Isis|Lena]], [[Jesse Glenn|Jesse]], and [[Zenet Surrow|Zenet]] by escaping [[Kazarina]]'s ship before he could be caught with failure. Though he is a Gundalian, he has a respect for [[Fabia Sheen]] and was amazed by [[Aranaut]] and [[Lumagrowl]]'s level 2 [[Battle Gear]] abilities.

He seems to be the most calm person of the team when it come to a battle, but when it comes to anything else he freaks out and blames [[Avior]]. He also calls his partner "old timer" or "old dog" in many of the episodes.

He is shown to be friends with his teammates [[Ren Krawler|Ren]] and Jesse, and does not hold a grudge against [[Jake Vallory|Jake]] despite his defeat at Jake's hands. However, he and Avior don't seem to get along and constantly argue with each other; Avior thinks Mason is a smart aleck, while Mason finds Avior naggy.

====[[Bakugan: Gundalian Invaders]]====In ''[[Brawler To Be]]'', he battles an unnamed kid with a [[Raptorix]] and wins. Then, Dan challenges him to a battle, but [[Jake]] steps in and wants to prove himself. He defeats Jake in the first round, but loses in a rematch.

In ''[[Confrontation]]'', he and Lena lost to two top-ranked players while using their non-[[Guardian Bakugan]] to test their strength. The kids were then brought back to the [[Twelve Orders]] and hypnotized by [[Kazarina]] in order to recruit them.

In ''[[Hostile Takeover]]'', he faces [[Dan Kuso]] and [[Shun Kazami]] in a tag brawl with [[Taylor]] (a brainwashed kid). He lost this battle, even after using his [[Battle Gear]]. Later, he and the rest of Ren's team, save for Sid, are chewed out in ''[[The Sacred Orb]]'' for their failure to recruit the [[Battle Brawlers]] to their side against [[Neathia]].

In ''[[Decoy Unit]]'', he reveals his actual form and is given a second chance by [[Airzel]] against [[Marucho]] and Jake. The battle ended in a tie after Marucho and Jake fled the battle using [[Akwimos]]'s last ability, which froze [[Avior]] and [[Strikeflier]] and distracted the Gundalians.

In ''[[The Secret of the Orb]]'', Mason heads off with Kazarina, who was sent off with [[Nurzak]] on a reconnaissance mission. However, Mason escapes after striking down two [[Gundalian]] guards. He then heads off to Neathia, possibly to switch sides, but falls into a large crack in the ground when the [[Sacred Orb]] gets "angry" and starts shattering everything. Although Avior saves him from falling, both are sent around the dimensions when the Sacred Orb gave off a massive energy surge.

In ''[[Genesis]]'', Mason and Avior are seen stuck in between dimensions along with Nurzak and [[Sabator]]. After Dan defeats [[Dragonoid Colossus]], he is brought to Neathia along with Nurzak and joined the Brawlers as they travel to Gundalia. He changes back into his human form again.

In ''[[Infiltrated]]'', he, Ren, Nurzak, and [[Fabia]] split off from the rest of the Brawlers to rescue his former teammates, Lena, Jesse, and Zenet. Later, he and Ren split off into another group to rescue his teammates while Nurzak and Fabia battled Kazarina and [[Stoica]].

In ''[[Redemption]]'', he and Ren reach the lab, only to find that [[Lena]], [[Jesse]], and [[Zenet]] have been removed from their stasis tubes. The two of them later meet up with Fabia and she explains what happened.

In ''[[Final Strike]]'', he leaves the Brawlers to look for Nurzak, who he still believes is still alive. At the end of the episode, he is seen continuing his search for evidence of Nurzak. He finds Nurzak in ''[[Gundalian Showdown]],'' just in time to help Fabia defeat Kazarina. Even though he ends up only watching Fabia and Nurzak battle, he continues to observe the battle in ''[[Broken Spell]].''

In ''[[Code Eve (episode)]]'', he, Fabia, and Nurzak rush to Nurzak's ship to return to Neathia and help the Brawlers fight Barodius. On the way, they are stopped by [[Gill]] and Fabia and Mason fight him in order to buy Nurzak time to start up the ship. After they return to Neathia, Mason reunites with his teammates.

In ''[[Destiny Revealed]]'', he reunites with his former teammates on Neathia, but is easily defeated by Phantom Dharak when they try to attack Barodius. After Dan emerges victorious against Barodius, the Gundalians return to their homeland.

====[[Bakugan: Mechtanium Surge]]====Mason made his only appearance in an image, trying to defend Gundalia from the Chaos Bakugan with Avior.

====[[Bakugan: Gundalian Invaders]]====*[[Subterra]] [[Avior]] ([[Guardian Bakugan]])*[[Silver]] [[Lashor]] ([[Battle Gear]])*[[Pyrus]] [[Clawsaurus]]

*He shares his surname with [[Joe Brown|Joe]], though they are not related.**He shares his given name with [[Mason (Bakugan Dimensions)|Mason]] in [[Bakugan Dimensions]], but the two are entirely different characters and use different elements (Subterra and Ventus).*He tends to spazz out when things don't go his way (much like [[Shadow Prove|Shadow]]) as he blamed Avior when he lost to Jake and started laughing for no reason when he discovered he was walking in circles.*He and Nurzak, both of who are Subterra brawlers, joined the Battle Brawlers in [[Genesis|Episode 29]].**He is the third Gundalian to join the Battle Brawlers, after Nurzak and Ren.*Dan said both Mason and Nurzak were sent between dimensions by Barodius. While this is true for Nurzak, this is not entirely true for Mason, who was accidentally sent by the Orb.*In episode 36, it was shown that Mason may like [[Fabia]], because he was flirting with her when he arrived with Nurzak, and Avior told him, "Quit flirting, we are here to settle a score". Also, in another episode, he commented about the level 3 Battle Gear ability she used, prompting Avior to ask that if he was jealous.*His human form seems to be less bulky than his Gundalian form; when he transforms from Gundalian to Human form, his chest and arm muscles get smaller.*He is the only member of the [[Gundalian Agents]] (excluding Ren) to escape punishment from a Major Twelve Order.

Mason is shown to be a skilled brawler, only losing three times against the Brawlers, one of which was on purpose.

====Bakugan: Gundalian Invaders===={| style="float:left;" border="1" width="50%"! colspan="3" style="background: brown; text-align: center;" | Record

! Opponent(s) !! Episode(s) !! Outcome

| [[Order of the Castle Knights|The Castle Knights]] (Tag with the [[Twelve Orders]]) || Offscreen || Win

| Unknown Ventus Brawler || [[Brawler To Be|4]] || Win

| [[Jake Vallory]] || [[Brawler To Be|4]] || Win

| [[Jake Vallory]] || [[Brawler To Be|4]] || Lose

| Unknown Darkus & Subterra Brawlers (Tag with [[Lena Isis|Lena]]) || [[Confrontation|5]] || Lose (Deliberate)

| [[Casey]] & [[Taylor]] (Tag with [[Sid Arkale|Sid]]) || [[Hostile Takeover|8]] || Win

| [[Dan Kuso]] & [[Shun Kazami]] (Tag with [[Taylor]]) || [[Hostile Takeover|8]] || Lose

| [[Jake Vallory]] & [[Marucho Marukura]] (Tag with [[Airzel]]) || [[Decoy Unit|15]] || No Outcome

| [[Gill]] (Tag with [[Fabia Sheen|Fabia]]) || [[Code Eve (episode)|38]] || No Outcome

| [[Barodius]] & [[Stoica]] (Tag with the [[Battle Brawlers]] and the [[Order of the Castle Knights|Castle Knights]]) || [[Code Eve (episode)|38]] || Lose

====Bakugan: Mechtanium Surge===={| style="float:left;" border="1" width="50%"! colspan="3" style="background: brown; text-align: center;" | Record

! Opponent(s) !! Episode(s) !! Outcome

| [[Chaos Bakugan|Chaos Bakugan Army]] (Tag with [[Jesse Glenn|Jesse]]) || [[Battle Lines|18]] || No Outcome

{{Twelve Orders}}{{Main characters 3}}

[[Category:Bakugan: Gundalian Invaders]][[Category:Bakugan: Mechtanium Surge]][[Category:Former Villains]][[Category:Battle Brawlers]][[Category:Twelve Orders]][[Category:Subterra Users]]