Guardian Bakugan (Japanese Version: Ace Monster (エースモンスター, Ēsu Monsutā?) refers to the favorite or top Bakugan of a certain Bakugan brawler.
There is a common misconception that Guardian Bakugan refers to talking Bakugan, as in actuality all Bakugan are capable of speech in the anime, with the exception of Mechanical Bakugan, Synthetic Bakugan, Chaos Bakugan, and the six Bakugan used by Team Anubias and Team Sellon.
The term "Guardian Bakugan" was in fact never used in the anime. They were known as Partner Bakugan or simply Partners.
Bakugan Battle Brawlers
Battle Brawlers
- Dan Kuso - Pyrus Dragonoid / Pyrus Delta Dragonoid / Pyrus Ultimate Dragonoid / Pyrus Infinity Dragonoid
- Runo Misaki - Haos Tigrerra / Haos Blade Tigrerra
- Shun Kazami - Ventus Skyress / Ventus Storm Skyress
- Julie Makimoto - Subterra Gorem / Subterra Hammer Gorem
- Marucho Marukura - Aquos Preyas / Aquos Angelo/Diablo Preyas
- Alice Gehabich - Darkus Alpha Hydranoid
Doom Beings
- Hal-G - Naga / Silent Naga
- Masquerade - Darkus Reaper / Darkus Hydranoid / Darkus Dual Hydranoid / Darkus Alpha Hydranoid
Other
- Chan Lee - Pyrus Fourtress
- Klaus von Hertzon - Aquos Sirenoid
- Billy Gilbert - Subterra Cycloid
- Komba O'Charlie - Ventus Harpus
- Julio Santana - Haos Tentaclear
- Jewls - Subterra Centipoid
- Jenny - Aquos Siege
- Christopher - Aquos Juggernoid
- Travis - Darkus Warius
- Akira - Subterra Centipoid
- Nene - Ventus Ravenoid
- Shuji - Darkus Fear Ripper
- Joe Brown - Wavern
Bakugan Battle Brawlers: New Vestroia
Bakugan Battle Brawlers Resistance
- Dan Kuso - Pyrus Neo Dragonoid / Pyrus Apollonir / Pyrus Cross Dragonoid / Pyrus Helix Dragonoid + Pyrus Scorpion
- Shun Kazami - Ventus Ingram / Ventus Master Ingram / Ventus Hawktor (Digital Clone) + Ventus Hylash
- Marucho Marukura - Aquos Elfin / Aquos Minx Elfin/ Aquos Preyas / Aquos Akwimos (Digital Clone) + Aquos Tripod Epsilon
- Ace Grit - Darkus Percival / Darkus Knight Percival + Darkus Falcon Fly
- Mira Fermin - Subterra Thunder Wilda / Subterra Magma Wilda + Subterra Baliton
- Baron Leltoy - Haos Mega Nemus / Haos Saint Nemus + Haos Piercian
- Spectra Phantom - Pyrus Helios MK2 + Pyrus Metalfencer
- Gus Grav - Subterra Rex Vulcan + Subterra Hexados
- Hydron- Subterra Dryoid
Vexos
- Spectra Phantom - Pyrus Viper Helios / Pyrus Cyborg Helios / Pyrus Helios MK2 + Pyrus Metalfencer
- Mylene Farrow - Aquos Elico / Aquos Macubass + Aquos Tripod Theta
- Lync Volan - Ventus Altair / Ventus Aluze + Ventus Wired
- Gus Grav - Subterra Premo Vulcan / Subterra Rex Vulcan + Subterra Hexados
- Shadow Prove - Darkus Hades / Darkus MAC Spider + Darkus Fortress
- Volt Luster - Haos Mega Brontes / Haos Boriates + Haos Dynamo
- Hydron - Subterra Dryoid
- Zenoheld - Pyrus Farbros
Other
- Runo Misaki - Haos Blade Tigrerra
- Julie Makimoto - Subterra Hammer Gorem
- Alice Gehabich - Darkus Alpha Hydranoid
- Annie of the Dark Angels - Haos Anchorsaur (taken by Ace)
- Vanessa of the Dark Angels - Haos Hammersaur (taken by Shun)
- Chan Lee - Pyrus Fourtress
- Billy Gilbert - Subterra Cycloid
- Klaus von Hertzon - Aquos Sirenoid
Bakugan: Gundalian Invaders
Battle Brawlers
- Dan Kuso - Pyrus Helix Dragonoid / Pyrus Lumino Dragonoid / Pyrus Dragonoid Colossus / Pyrus Blitz Dragonoid / Pyrus Titanium Dragonoid
- Fabia Sheen - Haos Aranaut
- Marucho Marukura - Aquos Akwimos
- Jake Vallory - Subterra Coredem
- Shun Kazami - Ventus Hawktor
- Ren Krawler - Darkus Linehalt
Twelve Orders
- Barodius - Darkus Dharak / Darkus Phantom Dharak
- Gill - Pyrus Krakix
- Kazarina - Haos Lumagrowl
- Stoica - Aquos Lythirus
- Nurzak - Subterra Sabator
- Airzel - Ventus Strikeflier
Gundalian Agents
- Ren Krawler - Darkus Linehalt
- Sid Arkale - Pyrus Rubanoid
- Lena Isis - Aquos Phosphos
- Zenet Surrow - Haos Contestir
- Jesse Glenn - Ventus Plitheon
- Mason Brown - Subterra Avior
Castle Knights
- Linus Claude - Pyrus Neo Ziperator / Pyrus Rubanoid
- Captain Elright - Haos Raptorix
Other
- Taylor - Darkus Venoclaw
- Casey - Ventus Buz Hornix
- Sein Pam - Ventus Ziperator
- Lewin Pam - Darkus Ramdol
- Koji Beetle - Subterra Luxtor
- Shuji - Haos Longfly (Digital Clone)
Bakugan: Mechtanium Surge
Battle Brawlers
- Dan Kuso - Pyrus Titanium Dragonoid / Pyrus Fusion Dragonoid / Haos Reptak
- Marucho Marukura - Aquos Infinity Trister / Aquos Radizen / Subterra Roxtor
- Shun Kazami - Ventus Taylean / Ventus Jaakor / Darkus Orbeum / Darkus Skytruss
- Spectra Phantom - Darkus Infinity Helios
- Paige - Subterra Boulderon
- Rafe - Haos Wolfurio
- Mira Fermin - Subterra Roxtor
- Runo Misaki - Haos Aerogan
- Gunz Lazar - Haos Reptak
Chaos Army
- Mag Mel - Darkus Razenoid / Darkus Evolved Razenoid
- Anubias - Darkus Horridian
- Sellon - Ventus Spyron
Nonet Army Faction
- Wiseman - Darkus Betadron / Darkus Kodokor / Darkus Mutabrid / Pyrus Spatterix / Ventus Worton / Aquos Balista / Subterra Stronk / Haos Tremblar
- Wiseman 2.0 - Darkus Betadron/ Darkus Kodokor / Darkus Mutabrid / Pyrus Spatterix / Subterra Stronk / Haos Tremblar
Other
- Noah - Subterra Ziperator
- Ben - Pyrus Bolcanon / Pyrus Ziperator
- Jack Punt - Aquos Krakenoid / Aquos Ziperator
- Robin - Aquos Krakenoid, Pyrus Bolcanon, Ventus Ziperator
- Chris - Subterra Vertexx / Darkus Clawsaurus
- Soon - Haos Krowll / Haos Spidaro
- Ren Krawler - Darkus Linehalt
- Captain Elright - Haos Aranaut
- Gus Grav - Subterra Rex Vulcan
Bakugan: Battle Planet
Awesome Brawlers
- Dan Kouzo - Pyrus Dragonoid (Hyper Dragonoid/Titan Dragonoid/Maximus Dragonoid)/ Pyrus Cyndeous/ Pyrus Kelion
- Shun Kazami - Aquos Hydorous (Hyper Hydorous) / Aquos Fade Ninja / Aquos Vicerox
- Wynton Styles - Ventus Trox (Hyper Trox) / Ventus Lupitheon / Ventus Turtonium
- Lia Venegas - Haos Pegatrix (Hyper Pegatrix) / Haos Gorthion / Haos Cubbo
- Lightning - Darkus Howlkor (Hyper Howlkor) / Darkus Artulean / Darkus Phaedrus
AAAnimus Inc.
- Philomena Dusk - Haos Apollyon
- Benton Dusk - Aquos Hydranoid
- Col. Armstrong Tripp - Haos Pandoxx / Darkus Cloptor
Exit Team
- AAY - Ventus Mantonoid
- BEE - Aquos Mantoid
- CEE - Darkus Mantoid
- DEE - Haos Mantoid
- E - Pyrus Mantoid
- Magnus Black - Darkus Nillious (Hyper Nillious/Titan Nillious)
- Strata the Hunter - Aquos Krakelios
- China Riot - Ventus Maxotaur
- Kurin - Darkus Garganoid
Other
- Masato Kazami - Aquos Serpenteze
- Marco Chezanello - Pyrus Nobillious
- Mac - Pyrus Skorporos
- Max - Ventus Skorporos
- Maggie - Aquos Skorporos
- Lord Brakken - Haos Zentaur
Bakugan: Armored Alliance
Awesome Brawlers
- Dan Kouzo - Pyrus Dragonoid (Dragonoid X Darkus/Dragonoid X Aurelus/Dragonoid Infinity) / Pyrus Cyndeous/ Pyrus Kelion/ Pyrus Gillator
- Shun Kazami - Aquos Hydorous (Hydrous X Ventus/Hydorus X Aurelus) / Aquos Fade Ninja / Aquos Vicerox / Aquos Ramparian
- Wynton Styles - Ventus Trox (Trox X Haos/Trox X Aurelus) / Ventus Lupitheon / Ventus Turtonium / Ventus Batrix
- Lia Venegas - Haos Pegatrix (Pegatrix X Pyrus/Pegatrix X Aurelus) / Haos Gorthion / Haos Cubbo / Haos Sairus
- Lightning - Darkus Howlkor (Howlkor X Aquos/Howlkor X Aurelus) / Darkus Artulean / Darkus Phaedrus / Darkus Tretorous
- Ajit - Aureleus Pharol (Pharol X Pyrus) / Aurelus Auxillataur
Haavik's Thrall
- Haavik - Sabrus
- Sophie Judson-Warfield - Aquos Centipod
- Calloway Storm - Ventus Cimoga
- McQ - Pyrus Cycloid
- Everett Ray - Haos Maxodon
- Ebony - Ventus Ryerazu
Independent
- Magnus Black - Darkus Nillious / Darkus Eenoch
- China Riot - Ventus Maxotaur / Ventus Barbetra
Other
- Masato Kazami - Aquos Serpenteze
- Marco Chezanello - Pyrus Nobillious
- Mac - Pyrus Skorporos
- Max - Ventus Skorporos
- Maggie - Aquos Skorporos
- Lord Brakken - Ventus Trunkanious
- Emily Black - Haos Webam
Bakugan: Geogan Rising
Awesome Brawlers
- Dan Kouzo - Pyrus Dragonoid + Pyrus Geogan Arcleon
- Shun Kazami - Aquos Sharktar + Aquos Geogan Stingzer
- Wynton Styles - Ventus Falcron + Ventus Geogan Talan
- Lia Venegas - Haos Fenneca + Haos Geogan Arachnia
- Lightning - Darkus Ferascal + Darkus Geogan Montrapod
- Ajit - Aurelus Pincitaur + Aurelus Geogan Titan King
Gregorius Reed
- Gregorius Reed - Aurelus Spartillion (formerly) / Aurelus Viloch (formerly)
- McQ - Pyrus Cycloid + Pyrus Geogan Surturan / Pyrus Toronoid + Pyrus Geogan Amphrog
- Crystal Blue - Aquos Apophix + Aquos Geogan Stardox + Aquos Geogan Swarmer
- Jenny Hackett - Haos Crustillion + Haos Geogan Mutasect
- Strata the Hunter - Ventus Harperion + Ventus Geogan Viperagon
- Everett Ray - Darkus Oxidox / Darkus Demorc + Darkus Geogan Sluggler
Independent
- Magnus Black - Darkus Nillious + Darkus Geogan Hyenix
Other
- Marco Chezanello - Pyrus Nobillious
- Mac - Pyrus Skorporos
- Max - Ventus Skorporos
- Maggie - Aquos Skorporos
Other
Video Game
- Protagonist - Leonidas / Omega Leonidas
- Marduk - Darkus Vladitor / Darkus Battle Ax Vladitor
- Akira - Subterra Terrorclaw
- Emperor Hurranos - Haos Mega Brontes
- General Phobos - Darkus Dharak
- Dr. Xeron - Pyrus Bolcanon
- Asteria - Aquos Krakenoid
- Typhoon - Ventus Taylean
- Ceros - Subterra Vertexx
- Eva-Q8 - Darkus Knight Percival
Bakugan: The Evo Tournament
BakuTech! Bakugan
Team Dragaon
- Harubaru Hinode - Pyrus Flare Dragaon / Pyrus Gren Dragaon / Pyrus Rise Dragaon
- Raichi Kuronashi - Darkus Destroy Munikis / Darkus Zero Munikis / Darkus Hollow Munikis
- Koh Grif - Haos Kilan Leoness
- Sho Grif - Ventus Van Falco
BakuThieves
- Zakuro - Darkus Dio Sivac
- Pumpkey - Subterra Gran Panzer
- Catol - Pyrus Hammer Cannon
Other
- Quilt - Aquos Saint Aquas
- Sham - Haos Blan Shoult
- Orochi - Subterra Gavli Anacon
- Shagi - Aquos Killer Volca
- Hyōga - Subterra Zak Jaguard
- Atra - Haos Gigan Taures
- Gumito - Pyrus Flame Aigle