- A.I.M.
- A.I.M. (Productions Universe)
- A.I.M. (The Marvel Super Heroes)
- A.I.M. (Yost Universe)
- A/R Spacesuit (Spider-Man: The New Animated Series)
- AIM
- AIM (Yost Universe)
- AKOM
- AKOM Productions
- A Midsummer Night's Dream
- A Very Spidey Christmas
- A Visit from St. Nicholas (The Spectacular Spider-Man)
- Abigail Brand
- Abomination
- Abomination (Marvel Disk Wars: The Avengers)
- Abomination (The Avengers: Earth's Mightiest Heroes)
- Abomination (Yost Universe)
- Abraham Erskin (The Marvel Super Heroes)
- Abraham Erskine (The Marvel Super Heroes)
- Abraham Lincoln
- Abraham Van Helsing (Dracula: Sovereign of the Damned)
- Absorbing Man
- Absorbing Man (Marvel Disk Wars: The Avengers)
- Absorbing Man (Marvel Super Hero Adventures)
- Absorbing Man (Marvel Universe)
- Absorbing Man (The Marvel Super Heroes)
- Absorbing Man (Yost Universe)
- Academy Award
- Academy Awards
- Acid
- Acolytes
- Acolytes (X-Men: Evolution)
- Acolytes (Yost Universe)
- Adam Hendershott
- Adam Warlock
- Adam Warlock (Funko Universe)
- Adam Warlock (Yost Universe)
- Adam West
- Adamantium
- Adamantium (Pryde of the X-Men)
- Adamantium (Yost Universe)
- Adolf Hitler
- Adolf Hitler (Productions Universe)
- Adolf Hitler (The Marvel Super Heroes)
- Adrian Egan
- Adrian Pasdar
- Adrian Toomes
- Adrian Toomes (The Spectacular Spider-Man)
- Adventures of the X-Men (Comic)
- Aegis
- Aerosmith
- Africa
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- Africa (X-Men: Evolution)
- Africa (Yost Universe)
- Agamotto
- Agatha Harkness
- Age of Apocalypse
- Age of Apocalypse (Yost Universe)
- Agent 13 (The Marvel Super Heroes)
- Agent 2 (The Marvel Super Heroes)
- Agent Axis (The Marvel Super Heroes)
- Agent R (The Marvel Super Heroes)
- Agent X
- Aggression
- Aimee Garcia
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- Air-Walker (Yost Universe)
- Aircraft Carrier
- Airport
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- Aki
- Aki (Madhouse Universe)
- Aki (Marvel Anime)
- Akiko Anne Morison
- Akiko Morison
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- Alan Johnson
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- Alan Tudyk
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- Alessandro Juliani
- Alex Desert
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- Alexander Hamilton
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- Alexi Shostakov
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- Ali Hillis
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- Alicia Masters (Productions Universe)
- Alisa Silvermane
- Alisha Silvermane
- Alisha Silvers
- Alison Sealy-Smith
- Alistair Smythe
- Alistair Smythe (Spider-Carnage Universe)
- Alistar Smythe
- Allan Melvin
- Allies for Peace (The Marvel Super Heroes)
- Allies for Peace (The Marvel Superheroes)
- Alligator
- Alpha
- Alpha Flight
- Altarra (Solarman)
- Alti Firmansyah
- Alyson Court
- Amadeus Cho
- Amanda Sefton
- Amanda Sefton (X-Men: Evolution)
- Ambulance
- Amelia Voght
- American
- American Broadcasting Company
- Amnesia
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- Amphibius
- Amy Hill
- Amy Pascal
- An-Sara (Planet Hulk)
- Anachnoid (Productions Universe)
- Anaconda (Yost Universe)
- Anastasia Hardy
- Ancient One
- Ander (Yost Universe)
- Andi Chapman
- Andre Cocteau
- Andre Stojka
- Andre Ware
- Andrew's TV
- Andrew Robinson
- Andrew Scott
- Android
- Android (Planet Hulk)
- Andros Stark (Iron Man: Armored Adventures)
- Andy Richter
- Anelle (Fantastic Four (1967))
- Angel
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- Angel (The Marvel Super Heroes)
- Angel (Wolverine and the X-Men)
- Angel (X-Men: Evolution)
- Angel (Yost Universe)
- Angela (Disambiguation)
- Angela Bryant
- Animal Farm
- Anna Watson
- Anna Watson (Spider-Man (Armored) Universe)
- Annalee
- Anne-Marie Johnson
- Anne Lockhart
- Anne Moss
- Annie Lockhart
- Annihilus
- Annihilus (Marvel Universe)
- Annihilus (Productions Universe)
- Annihilus (Yost Universe)
- Ant-Man
- Ant-Man (Fantastic Four: World's Greatest Heroes)
- Ant-Man (Marvel Super Hero Adventures)
- Ant-Man (TV Series)
- Ant-Man (The Avengers: Earth's Mightiest Heroes)
- Ant-Man (The Super Hero Squad Show)
- Ant-Man (Unproduced Series)
- Ant-Man (Yost Universe)
- Ant-Man Episodes
- Anthony Modzy
- Anthony Mozdy
- Anthony Pope
- Anti-Venom (Marvel Universe)
- Anton Vanko (The Marvel Super Heroes)
- Ape
- Ape (The Spectacular Spider-Man)
- Apocalypse
- Apocalypse (X-Men: Evolution)
- Apocalypse (X-Men: The Animated Series)
- Apocalypse (Yost Universe)
- April Strange (Doctor Strange: The Sorcerer Supreme)
- Arachnoid (Productions Universe)
- Arachnophobia
- Arad Nebula
- Aragorn (Productions Universe)
- Arcade
- Arcade (Pryde of the X-Men)
- Arcade (X-Men: Evolution)
- Archangel
- Archangel (Yost Universe)
- Archimedes
- Arctic
- Ariel (Productions Universe)
- Arizona
- Arkon
- Arlin Miller
- Armor
- Arnim Zola (Yost Universe)
- Arnold Schwarzenegger
- Arrkam (The Marvel Super Heroes)
- Art Metrano
- Art Vitello
- Arthur Avis
- Arthur Pierce
- Arthur Vitello
- Artificial Intelligence
- Ascension, Part One
- Asgard
- Asgard (Next Avengers: Heroes of Tomorrow)
- Asgard (Planet Hulk)
- Asgard (Ultimate Avengers)
- Asgard (Yost Universe)
- Asgard Pub Owner (Yost Universe)
- Ashley Kafka
- Ashley Kafka (The Spectacular Spider-Man)
- Asia
- Asteroid M
- Asteroid M (Pryde of the X-Men)
- Asteroid M (X-Men: Evolution)
- Astonishing X-Men (TV Series)
- Astonishing X-Men Season Four
- Astonishing X-Men Season One
- Astonishing X-Men Season Three
- Astonishing X-Men Season Two
- Astra
- Atham (Spider-Man (1967))
- Atlantis
- Attack of the Octobot
- Attuma
- Attuma (Fantastic Four (1967))
- Attuma (The Marvel Super Heroes)
- Auld Lang Syne (The Spectacular Spider-Man)
- Aunt May
- Aurora
- Aurora Borealis
- Auschwitz Concentration Camp (X-Men: Evolution)
- Austin Post
- Australia
- Avalanche
- Avalanche (X-Men: Evolution)
- Avalanche (Yost Universe)
- Ave Maria (Sony Universe)
- Avenger's Mansion (Next Avengers: Heroes of Tomorrow)
- Avengers
- Avengers: Ultron Revolution (TV Series)
- Avengers: United They Stand
- Avengers (Age of Apocalypse)
- Avengers (Disambiguation)
- Avengers (Marvel Disk Wars: The Avengers)
- Avengers (Marvel Super Hero Adventures)
- Avengers (Marvel Universe)
- Avengers (Next Avengers: Heroes of Tomorrow)
- Avengers (Productions Universe)
- Avengers (Spider-Man and His Amazing Friends)
- Avengers (The Marvel Super Heroes)
- Avengers (Ultimate Avengers)
- Avengers (Yost Universe)
- Avengers Assemble (TV Series)
- Avengers Assemble Season Five
- Avengers Assemble Season Four
- Avengers Assemble Season One
- Avengers Assemble Season Three
- Avengers Assemble Season Two
- Avengers Confidential: Black Widow & Punisher (Video)
- Avengers Mansion
- Avengers Mansion (Next Avengers: Heroes of Tomorrow)
- Avengers Mansion (Yost Universe)
- Avi Arad
- Awesome Android (The Marvel Super Heroes)
- Azari
- Azari (Next Avengers: Heroes of Tomorrow)
- B.J. Ward
- B. J. Ward
- Baboon
- Backstab
- Baffin Island
- Bail
- Bailiff
- Bait
- Bait 'n' Switch (Short)
- Baja California
- Balder
- Balder (Productions Universe)
- Balder (The Marvel Super Heroes)
- Balder (Yost Universe)
- Balkans (Dracula: Sovereign of the Damned)
- Banshee
- Bantam
- Banton Blackwood (Fred and Barney Meet the Thing)
- Bar
- Barbara Goodson
- Barbarus
- Bard
- Baron Heinrich Zemo
- Baron Helmut Zemo
- Baron Mordo
- Baron Strucker
- Baron Strucker (The Avengers: Earth's Mightiest Heroes)
- Baron Strucker (Yost Universe)
- Baron Von Rathenraven (Spider-Man (1967))
- Baron Zemo
- Baron Zemo (Marvel Disk Wars: The Avengers)
- Baron Zemo (The Avengers: Earth's Mightiest Heroes)
- Baron Zemo (The Marvel Super Heroes)
- Baron Zemo (Yost Universe)
- Baron von Strucker
- Barry Flatman
- Bartow (Productions Universe)
- Basallo (The Marvel Super Heroes)
- Bat (Dracula: Sovereign of the Damned)
- Batchi (Spider-Woman)
- Batroc the Leaper (The Marvel Super Heroes)
- Battlestar
- Baxter Bigelow (Productions Universe)
- Baxter Bigelow (Spider-Man (1967))
- Baxter Building
- Bay of Fundy
- Baymax (Big Hero 6)
- Baymax (Comic)
- Bayou
- Bayville (X-Men: Evolution)
- Bayville High School (X-Men: Evolution)
- Beach (The Avengers: Earth's Mightiest Heroes)
- Beach (X-Men: Evolution)
- Beach (Yost Universe)
- Bean Counter
- Beast
- Beast (Age of Apocalypse)
- Beast (Marvel Disk Wars: The Avengers)
- Beast (Productions Universe)
- Beast (The Marvel Super Heroes)
- Beast (Wolverine and the X-Men)
- Beast (X-Men: Evolution)
- Beast (X-Men Evolution)
- Beast (Yost Universe)
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