Note: This is Ben's Arsenal before Ben 10: Advanced Hero, and is only canon to anything related to that show.
Prototype Omnitrix (Before Recalibration)
| Number | Alien | Species | Unlocked |
|---|---|---|---|
| 1 | Wildmutt | Vulpimancer | Original 10 |
| 2 | Four Arms | Tetramand | Original 10 |
| 3 | Grey Matter | Galvan | Original 10 |
| 4 | XLR8 | Kineceleran | Original 10 |
| 5 | Upgrade | Galvanic Mechamorph | Original 10 |
| 6 | Diamondhead | Petrosapien | Original 10 |
| 7 | Ripjaws | Piscciss Volann | Original 10 |
| 8 | Stinkfly | Lepidopterran | Original 10 |
| 9 | Heatblast | Pyronite | Original 10 |
| 10 | Cannonbolt | Arburian Pelarota | Unlocked after the destruction of Arburia prior to The Big Tick |
| 11 | Wildvine | Florauna | Unlocked from the mutated Flora in Camp Fear |
| 12 | Benwolf | Loboan | Unlocked from scanning the Yenaldooshi in Benwolf |
| 13 | Benmummy | Thep Khufan | Unlocked from scanning the Mummy in Under Wraps |
| 14 | Frankenstrike | Transylian | Unlocked by scanning Dr Viktor in Be Afraid of the Dark |
| 15 | Ghostfreak (Zs'Skayr form) | Ectonurite | Unlocked by scanning Zs'Skayr in Be Afraid of the Dark |
| 16 | Perk Upchuck | Perk Gourmand | Unlocked by Xylene in The Visitor |
| 17 | Ditto | Splixson | Accidentally unlocked by Ben in Divided We Stand |
| 18 | Eye Guy | Opticoid | Unlocked off-screen prior to Ben 10 vs. the Negative 10 |
| 19 | Way Big | To'kustar | Unlocked by Azmuth in Ben 10: Secret of the Omnitrix |
| 20 | Arctiguana | Polar Manzardill | Unlocked on Ben's 11th birthday |
Prototype Omnitrix (After Recalibration)
Playlist 1
| Number | Alien | Species | Unlocked |
|---|---|---|---|
| 1 | Goop | Polymorph | Original 10 |
| 2 | Swampfire | Methanosian | Original 10 |
| 3 | Chromastone | Crystalsapien | Original 10 |
| 4 | Big Chill | Necrofriggian | Original 10 |
| 5 | Humungousaur | Vaxasaurian | Original 10 |
| 6 | Brainstorm | Cerebrocrustacean | Original 10 |
| 7 | Jetray | Aerophibian | Original 10 |
| 8 | Spidermonkey | Arachnichimp | Original 10 |
| 9 | Echo Echo | Sonorosian | Original 10 |
| 10 | Alien X | Celestialsapien | Original 10 |
Playlist 2
| Number | Alien | Species | Unlocked |
|---|---|---|---|
| 11 | Cannonbolt | Arburian Pelarota | Unlocked using Master Control in War of the Worlds: Part 1 |
| 12 | Wildmutt | Vulpimancer | Unlocked using Master Control in War of the Worlds: Part 1 (off-screen) |
| 13 | Murk Upchuck | Murk Gourmand | Unlocked using Master Control in War of the Worlds: Part 1 |
| 14 | Way Big | To'kustar | Unlocked using Master Control in War of the Worlds: Part 1 |
| 15 | Ditto | Splixson | Unlocked using Master Control in War of the Worlds: Part 2 (off-screen) |
| 16 | Lodestar | Biosovortian | Unlocked after the Omnitrix reset in War of the Worlds: Part 2 |
| 17 | Heatblast | Pyronite | Unlocked by scanning Alan off-screen after War of the Worlds: Part 2 |
| 18 | Four Arms | Tetramand | Unlocked by scanning Manny off-screen after War of the Worlds: Part 2 |
| 19 | Nanomech | Human/Nanochip Hybrid | Unlocked by scanning the Nanochips in Ben 10: Alien Swarm |
| 20 | Diamondhead | Petrosapien | Unlocked through Chromastone's destruction in Vengeance of Vilgax: Part 2 |
Playlist 3
| Number | Alien | Species | Unlocked |
|---|---|---|---|
| 21 | Ghostfreak (Zs'Skayr form) | Ectonurite | Unlocked by scanning Zs'Skayr in Ghost Town |
| 22 | Rath | Appoplexian | Accidentally unlocked by Tiffin in Con of Rath |
Ultimatrix
Playlist 3 (cont.)
| Number | Alien | Species | Unlocked |
|---|---|---|---|
| 23 | Water Hazard | Orishan | Unlocked by scanning Bivalvan in Fame |
| 24 | Terraspin | Geochelone Aerio | Unlocked by scanning Galapagus in Escape From Aggregor |
| 25 | NRG | Prypiatosian-B | Unlocked by scanning P'andor in Too Hot to Handle |
| 26 | Armodrillo | Talpaedan | Unlocked by scanning Andreas in Andreas' Fault |
| 27 | AmpFibian | Amperi | Unlocked by scanning Ra'ad in Fused |
| 28 | Ripjaws | Piscciss Volann | Unlocked by scanning a Piscciss Volann in Deep (off-screen) |
| 29 | Fasttrack | Citrakayah | Unlocked off-screen prior to Basic Training |
| 30 | XLR8 | Kineceleran | Unlocked by Ben 10,000 in Ben 10,000 Returns |
Playlist 4
| Number | Alien | Species | Unlocked |
|---|---|---|---|
| 31 | Grey Matter | Galvan | Unlocked by Ben 10,000 in Ben 10,000 Returns |
| 32 | Stinkfly | Lepidopterran | Unlocked by Ben 10,000 in Ben 10,000 Returns |
| 33 | Upgrade | Galvanic Mechamorph | Unlocked by Ben 10,000 in Ben 10,000 Returns |
| 34 | Ghostfreak | Ectonurite | Unlocked by Ben 10,000 in Ben 10,000 Returns |
| 35 | Wildvine | Florauna | Unlocked by Ben 10,000 in Ben 10,000 Returns |
| 36 | Benwolf | Loboan | Unlocked by Ben 10,000 in Ben 10,000 Returns |
| 37 | Benmummy | Thep Khufan | Unlocked by Ben 10,000 in Ben 10,000 Returns |
| 38 | Frankenstrike | Transylian | Unlocked by Ben 10,000 in Ben 10,000 Returns |
| 39 | Perk Upchuck | Perk Gourmand | Unlocked by Ben 10,000 in Ben 10,000 Returns |
| 40 | Eye Guy | Opticoid | Unlocked by Ben 10,000 in Ben 10,000 Returns |
Playlist 5
| Number | Alien | Species | Unlocked |
|---|---|---|---|
| 41 | Arctiguana | Polar Manzardill | Unlocked by Ben 10,000 in Ben 10,000 Returns |
| 42 | Eatle | Oryctini | Unlocked by Ben 10,000 in Ben 10,000 Returns |
| 43 | Clockwork | Chronosapien | Unlocked by Ben 10,000 in Ben 10,000 Returns |
| 44 | Jury Rigg | Planchaküle | Unlocked by Ben 10,000 in Ben 10,000 Returns |
| 45 | Spitter | Sphoeroid | Unlocked by Ben 10,000 in Ben 10,000 Returns |
| 46 | Bob the Blob | Unknown | Unlocked by Ben 10,000 in Ben 10,000 Returns |
| 47 | Antigravitesla | Unknown | Unlocked by Ben 10,000 in Ben 10,000 Returns |
| 48 | Thriller Whale | Balentis | Unlocked by Ben 10,000 in Ben 10,000 Returns |
| 49 | Mossquito | Racomitrium Servum | Unlocked by Ben 10,000 in Ben 10,000 Returns |
| 50 | ChamAlien | Merlinisapien | Unlocked by scanning Prisoner 775 in Prisoner Number 775 Is Missing |
Playlist 6
| Number | Alien | Species | Unlocked |
|---|---|---|---|
| 51 | Shocksquatch | Gimlinopithecus | Accidentally unlocked in Heroes United |
| 52 | Jumbo | Pachydermian | Unlocked by scanning Trumbipular |
| 53 | Greeter | Tack's Species | Unlocked by scanning a member of Tack's species |
| 54 | Null Void Wildmutt | Null Void Vulpimancer | |
| 55 | Mykdl'dy Big Chill | Mykdl'dy Necrofriggian | Unlocked prior to The Beginning of the End |
| 56 | Babyface | Detrovite | Unlocked by scanning Vulkanus off-screen after Greetings From Techadon |
Omnitrix (Omniverse)
| Number | Alien | Species | Unlocked |
|---|---|---|---|
| 1 | Wildmutt | Vulpimancer | |
| 2 | Four Arms | Tetramand | |
| 3 | Grey Matter | Galvan | |
| 4 | XLR8 | Kineceleran | |
| 5 | Upgrade | Galvanic Mechamorph | |
| 6 | Diamondhead | Petrosapien | |
| 7 | Ripjaws | Piscciss Volann | |
| 8 | Stinkfly | Lepidopterran | |
| 9 | Ghostfreak | Ectonurite | |
| 10 | Heatblast | Pyronite | |
| 11 | Cannonbolt | Arburian Pelarota | |
| 12 | Wildvine | Florauna | |
| 13 | Blitzwolfer | Loboan | |
| 14 | Snare-Oh | Thep Khufan | |
| 15 | Frankenstrike | Transylian | |
| 16 | Perk Upchuck | Perk Gourmand | |
| 17 | Ditto | Splixson | |
| 18 | Eye Guy | Opticoid | |
| 19 | Way Big | To'kustar | |
| 20 | Arctiguana | Polar Manzardill | |
| 21 | Goop | Polymorph | |
| 22 | Swampfire | Methanosian | |
| 23 | Chromastone | Crystalsapien | |
| 24 | Big Chill | Necrofriggian | |
| 25 | Humungousaur | Vaxasaurian | |
| 26 | Brainstorm | Cerebrocrustacean | |
| 27 | Jetray | Aerophibian | |
| 28 | Spidermonkey | Arachnichimp | |
| 29 | Echo Echo | Sonorosian | |
| 30 | Alien X | Celestialsapien | |
| 31 | Murk Upchuck | Murk Gourmand | |
| 32 | Lodestar | Biosovortian | |
| 33 | Nanomech | Human/Nanochip Hybrid | |
| 34 | Ghostfreak (Zs'Skayr form) | Ectonurite | |
| 35 | Rath | Appoplexian | |
| 36 | Water Hazard | Orishan | |
| 37 | Terraspin | Geochelone Aerio | |
| 38 | NRG | Prypiatosian-B | |
| 39 | Armodrillo | Talpaedan | |
| 40 | AmpFibian | Amperi | |
| 41 | Fasttrack | Citrakayah | |
| 42 | Eatle | Oryctini | |
| 43 | Clockwork | Chronosapien | |
| 44 | Jury Rigg | Planchaküle | |
| 45 | Spitter | Sphoeroid | |
| 46 | Bob the Blob | Unknown | |
| 47 | Antigravitesla | Unknown | |
| 48 | Thriller Whale | Balentis | |
| 49 | Mossquito | Racomitrium Servum | |
| 50 | ChamAlien | Merlinisapien | |
| 51 | Shocksquatch | Gimlinopithecus | |
| 52 | Jumbo | Pachydermian | |
| 53 | Greeter | Tack's Species | |
| 54 | Null Void Wildmutt | Null Void Vulpimancer | |
| 55 | Mykdl'dy Big Chill | Mykdl'dy Necrofriggian | |
| 56 | Babyface | Detrovite | |
| 57 | Gravattack | Galilean | New Omnitrix |
| 58 | Astrodactyl | Unknown | New Omnitrix |
| 59 | Crashhopper | Orthopterran | New Omnitrix |
| 60 | Toepick | Unknown | New Omnitrix |
| 61 | Bloxx | Segmentasapien | New Omnitrix |
| 62 | Gutrot | Unknown | New Omnitrix |
| 63 | Ball Weevil | Unknown | New Omnitrix |
| 64 | Walkatrout | Ickthyperambuloid | Unlocked by Blukic and Driba in Outbreak |
| 65 | Pesky Dust | Nemuina | Unlocked by Blukic and Driba in Outbreak |
| 66 | Mole-Stache | Unknown | Unlocked by Blukic and Driba in Outbreak |
| 67 | The Worst | Atrocian | Unlocked by Blukic and Driba in Outbreak |
| 68 | Kickin Hawk | Unknown | Unlocked by scanning Liam in Outbreak |
| 69 | Feedback | Conductoid | Unlocked in Showdown: Part 2 |
| 70 | Bullfrag | Incursean | Unlocked by Azmuth in The Frogs of War: Part 2 |
| 71 | Buzzshock | Nosedeenian | |
| 72 | Atomix | Prypiatosian-A | Unlocked by Azmuth in For a Few Brains More |
| 73 | Whampire | Vladat | Unlocked by scanning Lord Transyl in The Vampire Strikes Back |
| 74 | Squidstrictor | Cephalod-ae | Unlocked off-screen |
| 75 | Rocks | Basalt | Unlocked off-screen |
| 76 | Ventrilosquid | Unknown | Unlocked off-screen |
| 77 | Portaler | Unknown | Unlocked off-screen |
| 78 | Plantapocalypse | Unknown | Unlocked off-screen |
| 79 | Trapflaura | Veridian Wildflower | Unlocked off-screen |
| 80 | EpiCentaur | Shianusapien | Unlocked off-screen |
| 81 | Hightide | T'zun Army | Unlocked off-screen |
| 82 | Eelectricity | Teslamorpha | Unlocked off-screen |
| 83 | Red | Probity's Species (Red) | Unlocked off-screen |
| 84 | Blue | Probity's Species (Blue) | Unlocked off-screen |
| 85 | Mello | Lewodan | Unlocked off-screen |
| 86 | Infivore | Pantophage | Unlocked off-screen |
| 87 | The Joke | Maxatomar | Unlocked off-screen |
| 88 | Minoer | Hulex | Unlocked off-screen |
| 89 | Cyclops | Churl | Unlocked off-screen |
| 90 | Elaskimo | Kraaho | Unlocked off-screen |
| 91 | Halfwit | Tummyhead's Species | Unlocked off-screen |
| 92 | Gigablast | Surgosapien | Unlocked off-screen |
| 93 | Tropiguana | Floral Manzardill | Unlocked off-screen |
| 94 | Inspector 10 | Techadon Weapon Master | Unlocked off-screen |
| 95 | Laabstr | Piscciss Premann | Unlocked off-screen |
| 96 | Rookie | Revonnahgander | Unlocked off-screen |
| 97 | Gold | Decka's Species (Gold) | Unlocked off-screen |
| 98 | Silver | Decka's Species (Silver) | Unlocked off-screen |
| 99 | Chromedome | Sylonnoid | Unlocked off-screen |
| 100 | Decagon Vreedle | Vreedle |
Trivia
- The Omnitrix started organizing aliens into playlists of 10 after the recalibration
- Ben had a total of 20 aliens before removing the Omnitrix prior to Alien Force
- This does not include Feedback, since he was removed from the Omnitrix
- Ben had a total of 22 aliens by the end of Alien Force
- Ben had a total of 64 aliens at the end of Ultimate Alien if you include the 8 Ultimate Forms
- Ben had a total of 99 aliens by the end of Omniverse
- After Ben unlocked his 100th alien, the Omnitrix recalibrated