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This Ben 10 trivia quiz has 50 free questions with answers and covers the whole franchise, not just the summer road trip. It starts with the original 2005 series - Ben, Gwen and Grandpa Max in the RV, the ten starting aliens, Vilgax, Kevin 11 and the Plumbers - then works through Alien Force, Ultimate Alien, Omniverse and the 2016 reboot, plus the two live-action films, the animated movies and the video games. Roughly a third of the questions are easy warm-ups written for younger fans (which alien is made of fire, what Ben shouts before he transforms, what Grandpa Max's RV is called). The rest climb through voice actors, working titles, episode trivia and merchandise numbers to the kind of detail only someone who watched all 393 episodes would know. Every answer has been checked against Wikipedia and the sources it cites, and each explanation adds one more thing worth knowing.
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Q 01How is Gwen Tennyson related to Ben in the original series?
His cousin
The two are the same age and spend the whole summer bickering in the back of Grandpa Max's RV.
Q 02What nickname does Grandpa Max's RV go by in the show?
The Rustbucket
The battered motorhome is where Ben's whole adventure starts, on the family's very first night of camping.
Q 03The Omnitrix is an alien device shaped like what everyday object?
A wristwatch
It latches onto Ben's wrist and refuses to come off, which is why he spends the summer wearing it everywhere.
Q 04Which of these is one of Ben Tennyson's catchphrases?
"It's Hero Time!"
His other regular line is "Goin' Hero!", usually shouted while slamming the dial down.
Q 05Which of Ben's aliens is a fiery, magma-bodied hero who can shoot flames?
Heatblast
It is the very first alien Ben turns into in the opening episode, and it also opens the live-action movie Race Against Time.
Q 06Which alien is a big red brawler with two extra limbs and super strength?
Four Arms
It was the first transformation the creators ever test-animated and their favourite of the whole set.
Q 07Which velociraptor-like alien gives Ben superhuman speed?
XLR8
The name is a pun on 'accelerate', and the character comes from a stormy planet called Kinet.
Q 08Which tiny frog-like alien is the brainiest of Ben's original transformations?
Grey Matter
It belongs to the same species as the genius who built the Omnitrix in the first place.
Q 09Which alien did the show's makers hide a villain inside, dropping hints throughout season one?
Ghostfreak
The creepy spectre eventually broke out of the device and was dropped from the opening credits from season three onward.
Q 10What secret organisation does Grandpa Max reveal he once belonged to?
The Plumbers
Ben and Gwen assumed the name meant he fixed pipes; it is actually an intergalactic law-enforcement outfit.
Q 11What is the name of Ben Tennyson's hometown?
Bellwood
In Ultimate Alien a young conspiracy theorist unmasks Ben simply by tracking alien sightings around the town.
Q 12Which orange, eyeless, dog-like alien hunts by smell and hearing rather than sight?
Wildmutt
The species is called Vulpimancer, and it was one of the four CGI aliens used in the first live-action film.
Q 13In the 2016 reboot, Kevin Levin wields a knock-off of Ben's device called what?
The Antitrix
It turns him into twisted versions of Ben's aliens plus one of his own, a jagged bruiser named Bashmouth.
Q 21What is Ben's future self called in the original series?
Ben 10,000
The name refers to how many alien forms he has by then, and in the sequel he gives his son Kenny a copy of the device for his tenth birthday.
Q 22What is Kevin Levin's power when he first meets Ben in New York?
Absorbing energy
Siphoning the Omnitrix left him a monstrous mash-up of Ben's aliens, which is how he got the nickname Kevin 11.
Q 23Which alien is Ben's new partner in Omniverse after Gwen and Kevin leave for college?
Rook Blonko
The by-the-book Revonnahgander carries a shapeshifting Proto-tool and constantly misreads Ben's Earth slang.
Q 14Ben's love interest in Alien Force is a tennis player named what?
Julie Yamamoto
Her pet, Ship, is a small alien of the same species as Upgrade that she and Ben find together.
Q 15Who built the Omnitrix?
Azmuth
In Alien Force he admits the device was designed to preserve the DNA of every species in the Milky Way, not to make weapons.
Q 16What is the name of the writers' collective that created Ben 10?
Man of Action
The four comic-book writers behind it later co-created Generator Rex and the Marvel comic that became Big Hero 6.
Q 17Who voiced ten-year-old Ben Tennyson in the original series?
Tara Strong
She had to re-audition for the 2016 reboot after the producers briefly considered casting a real child instead.
Q 18Which actor took over as teenage Ben starting with Alien Force?
Yuri Lowenthal
He was called back several times before landing the part, and later played the reboot's version of Vilgax.
Q 19Which alien does Ben unlock in the film Secret of the Omnitrix to beat Vilgax's army?
Way Big
The skyscraper-sized To'kustar returned to close out the reboot's 2020 movie as well.
Q 20Which alien does Ben discover at Yellowstone as the eleventh form on the Omnitrix?
Cannonbolt
The armadillo-ball alien was originally meant to be in the starting ten and later replaced the show's spooky ninth alien in the opening credits.
Q 24What is the underground alien city beneath Ben's hometown in Omniverse?
Undertown
The series alternated between sixteen-year-old Ben and eleven-year-old Ben, with the original voice actress returning for the younger one.
Q 25Who directed both of the Ben 10 films made with real actors, Race Against Time and Alien Swarm?
Alex Winter
Best known as Bill from Bill & Ted, he wanted the first film 'to look like X-Men' and promised 'no Jar Jar'.
Q 26In Race Against Time, who is the time-controlling villain hunting Ben?
Eon
The twist is that he is an evil Ben from an alternate timeline, a secret Grandpa Max had been keeping.
Q 27Which alien does Ben create in Alien Swarm by fusing his own DNA with the invading nanochips?
Nanomech
The tiny hero was voiced by the film's director himself, and flies inside a man's head to fight the swarm's queen.
Q 28What device replaces the destroyed prototype Omnitrix in Ultimate Alien?
The Ultimatrix
Its trick is evolving Ben's aliens into souped-up 'Ultimate' forms, and Ben eventually swaps it for a finished Omnitrix.
Q 29Who voiced Grandpa Max across the first four animated series?
Paul Eiding
He is also familiar to gamers as the voice of Colonel Roy Campbell in the Metal Gear Solid series.
Q 30Which alien race are the main villains of Alien Force's first two seasons?
The Highbreed
They see themselves as the galaxy's purest species but are secretly dying out from generations of inbreeding.