Ben 10 all aliens appear

It's Hero Time
# Heatblast(And Then There Were 10)
# Wildmutt(And Then There Were 10)
# Diamondhead(And Then There Were 10)
# XLR8(And Then There Were 10)
# Grey Matter(Washington B.C.)
# Four Arms(Washington B.C.)
# Stinkfly(Washington B.C.)
# Ripjaws(The Kraken)
# Upgrade(Permanent Retirement)
# Ghostfreak(Permanent Retirement)
# Cannonbolt(Big Tick)
# Wildvine(Camp Fear)
# Spitter(Ben 10,000)
# Buzzshock(Ben 10,000)
# Arcticquana(Ben 10,000)
# Blitzwolfer(Ben Wolf)
# Snare-Oh(Under Wraps and the Return)
# Frankenstrike(Be Afraid of the Dark)
# Upchuck(The Visitor)
# Ditto(Divided We Stand)
# Eye Guy(Ben 10 vs Negative 10)
# Way Big(Secret of the Omnitrix)
# Feedback(A Jolt from a Past)
# Swampfire(Ben 10 Returns Part 1)
# Echo Echo(Ben 10 Returns Part 2)
# Humungousaur(Ben 10 Returns Part 2)
# Jetray(Everybody Talks About The Weather)
# Big Chill(Kevin's Big Score)
# Chromastone(All That Glitters)
# Brainstorm(Pier Pressure)
# Spider Monkey(Be Knighted)
# Goop(Gauntlet)
# Alien X(X Equals Ben Plus 2)
# Nanomech(Alien Swarm)
# Lodestar(Simple)
# Rath(Con of Rath)
# Water Hazard(Too Hot to Handle)
# Ampfibian(Fused)
# Armodrillo(Hero Time)
# Terraspin(Reflected Glory)
# NRG(Forge of Creation)
# Shocksquatch(Ben 10 and Generator Rex Heroes Unite)
# Fasttrack(Basic Training)
# ChamAlien(Prisoner 775 is Missing)
# Eatle(A Knight to Remember)
# Clockwork(Catch a Fallen Star)
# Jury Rigg(The Eggman Cometh)
# Bloxx(The More things Changed)
# Gravattack(A Jolt from a Past)
# Crashhopper(It Was Them)
# Ball Weevil(Of Predators and Prey Part 1)
# Walkatrout(Outbreak)
# Pesky Dust(Outbreak)
# Mole-Stache(Outbreak)
# The Worst(Outbreak)
# Kickin Hawk(Outbreak)
# Toepick(Special Delivery)
# Astrodactyl(While You Were Away)
# Bullfrag(Frogs of War)
# Atomix(For a Few Brains More)
# Gutrot(Animo Crackers)
# Whampire(The Vampire Strikes Back)