Thelonius Viper, known as Professor Cobra (プロフェッサー・コブラ, Purofessā Kobura) in the Japanese version, is an opponent in Yu-Gi-Oh! Legacy of the Duelist and Yu-Gi-Oh! Legacy of the Duelist: Link Evolution. This is a video game depiction of Thelonious Viper, a character from the Yu-Gi-Oh! GX anime.

=Decks

Venomous Reptiles

Monsters

Effect Monsters

Spells

Snake Rain Terraforming x2 Venom Shot x2 Venom Swamp x3

Traps

Damage = Reptile x3 Offering to the Snake Deity x3 Rise of the Snake Deity x3 Snake Deity's Command Snake Whistle

Challenge Deck

Invasion of the Worms

Monsters

Effect Monsters

Extra Deck

Xyz Monsters

Spells

Raigeki Soul Charge

Traps

Bottomless Trap Hole Call of the Haunted x3 Fiendish Chain Mirror Force x2 Offering to the Snake Deity x3 W Nebula Meteorite x3 Wiretap

v e Thelonious Viper (Cobra) pages

Anime Tag Force World Championship Legacy of the Duelist

v e Yu-Gi-Oh! Legacy of the Duelist characters

Yu-Gi-Oh!	Alister Arkana Bandit Keith Bonz Dartz Ishizu Ishtar Joey Wheeler Mai Valentine Mako Tsunami Marik Ishtar Maximillion Pegasus Mokuba Kaiba Odion PaniK Rafael Rex Raptor Seeker Shadi Seto Kaiba Solomon Muto Strings Téa Gardner Tristan Taylor Valon Weevil Underwood Yami Bakura Yami Marik Yami Yugi Yugi Muto

Yu-Gi-Oh! GX	Adrian Gecko Alexis Rhodes Amnael Atticus Rhodes Aster Phoenix Axel Brodie Bastion Misawa Blair Flannigan Camula Chancellor Sheppard Chazz Princeton Chumley Huffington Dr. Vellian Crowler Jaden Yuki Jesse Anderson Jim Crocodile Cook Kagemaru Lyman Banner Marcel Bonaparte Masked Atticus Nightshroud Prof. Thelonious Viper Sartorius Kumar Syrus Truesdale Tania Titan Tyranno Hassleberry Vice Chancellor Bonaparte Winged Kuriboh Yubel Zane Truesdale

Yu-Gi-Oh! 5D's	Akiza Izinski Andre Antinomy Aporia Breo Bruno Bolt Tanner Broder Carly Carmine Crow Hogan Devack Dragan Greiger Halldor Hunter Pace Jack Atlas Jakob Jean Kalin Kessler Lazar Leo Lester Luna Misty Tredwell Mr. Armstrong Primo Rally Dawson Rex Goodwin Roman Goodwin Sayer Sherry LeBlanc Tenzen Yanagi Tetsu Trudge Yusei Fudo Zone

Yu-Gi-Oh! ZEXAL	Alito Anna Kaboom Astral Bronk Stone Cathy Katherine Dr. Faker Dextra Don Thousand Dumon Flip Turner Girag Hart Tenjo Kite Tenjo Mizar Mr. Heartland Nash Nistro Nelson Andrews Number 96 Orbital 7 Quattro Quinton Ray Shadows Reginald Kastle Rio Kastle Trey Tori Meadows Vector Vetrix Yuma Tsukumo Zexal Zexal III

Yu-Gi-Oh! ARC-V	Aura Sentia Celina Crow Hogan (ARC-V) Declan Akaba Dennis McField Dipper O'rion Gong Strong Jack Atlas (ARC-V) Julia Krystal Kit Blade Moon Shadow Officer 227 Shay Obsidian Sora Perse Sylvio Sawatari Yugo Yuto Yuya Sakaki Zuzu Boyle

Game original	IN4-M8

Portal

v e Yu-Gi-Oh! Legacy of the Duelist: Link Evolution characters

Yu-Gi-Oh!	Alister Arkana Bandit Keith Bonz Dartz Ishizu Ishtar Joey Wheeler Mai Valentine Mako Tsunami Marik Ishtar Maximillion Pegasus Mokuba Kaiba Odion PaniK Rafael Rex Raptor Seeker Shadi Seto Kaiba Solomon Muto Strings Téa Gardner Tristan Taylor Valon Weevil Underwood Yami Bakura Yami Marik Yami Yugi Yugi Muto

Yu-Gi-Oh! GX	Adrian Gecko Alexis Rhodes Amnael Atticus Rhodes Aster Phoenix Axel Brodie Bastion Misawa Blair Flannigan Camula Chancellor Sheppard Chazz Princeton Chumley Huffington Dr. Vellian Crowler Jaden Yuki Jesse Anderson Jim Crocodile Cook Kagemaru Lyman Banner Marcel Bonaparte Masked Atticus Nightshroud Prof. Thelonious Viper Sartorius Kumar Syrus Truesdale Tania Titan Tyranno Hassleberry Vice Chancellor Bonaparte Winged Kuriboh Yubel Zane Truesdale

Yu-Gi-Oh! 5D's	Akiza Izinski Andre Antinomy Aporia Breo Bruno Bolt Tanner Broder Carly Carmine Crow Hogan Devack Dragan Greiger Halldor Hunter Pace Jack Atlas Jakob Jean Kalin Kessler Lazar Leo Lester Luna Misty Tredwell Mr. Armstrong Primo Rally Dawson Rex Goodwin Roman Goodwin Sayer Sherry LeBlanc Tenzen Yanagi Tetsu Trudge Yusei Fudo Zone

Yu-Gi-Oh! ZEXAL	Alito Anna Kaboom Astral Bronk Stone Cathy Katherine Dr. Faker Dextra Don Thousand Dumon Flip Turner Girag Hart Tenjo Kite Tenjo Mizar Mr. Heartland Nash Nistro Nelson Andrews Number 96 Orbital 7 Quattro Quinton Ray Shadows Reginald Kastle Rio Kastle Trey Tori Meadows Vector Vetrix Yuma Tsukumo Zexal Zexal III

Yu-Gi-Oh! ARC-V	Alexis Rhodes (ARC-V) Aster Phoenix (ARC-V) Aura Sentia Celina Chojiro Tokumatsu Crow Hogan (ARC-V) Declan Akaba Dennis McField Dipper O'rion Gong Strong Jack Atlas (ARC-V) Jean Michel Roget Julia Krystal Kit Blade Kite Tenjo (ARC-V) Leo Akaba (Professor) Lulu Obsidian Moon Shadow Obelisk Force Officer 227 Riley Akaba Rin Shay Obsidian Sora Perse Sylvio Sawatari The Sledgehammer Yugo Yuri Yusho Sakaki Yuto Yuya Sakaki Z-ARC Zuzu Boyle

Yu-Gi-Oh! VRAINS	Ai Akira Zaizen Blue Angel Blue Gal Blue Maiden Bohman Ghost Gal Knight of Hanoi Lightning Playmaker Roboppi Soulburner Spectre The Gore The Shepherd Varis Windy

Game original	IN4-M8

Portal

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Thelonious Viper (Legacy of the Duelist)

=Decks

Challenge Deck

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