Humungousaur's back spikes pay homage to the Kaiju Godzilla from the Toho Monster series.-Ben unknowingly seeing the Prototype Omnitrix (Recalibrated).
Humungousaur is the second alien from Ben 10: Alien Force to appear in the reboot and be used by young Ben, the first one being Rath.
Other names considered by Ben include Gigantigecko, Iguana Monster, Roar Thing and Mega-Stega Dude.
Humungousaur's name was given to him by an unnamed female toddler.
The black spiked ball on the end of his tail is a reference to Ultimate Humungousaur of the classic continuity.
Humungousaur was first revealed to appear in the reboot on the packaging for the season 3 Omnitrix toy.
In Which Watch, Humungousaur defeated Monster Kevin.
In Introducing Kevin 11, Humungousaur convinced Bashmouth to help save people.
In Buggin' the Buggs, Humungousaur attempted to fight Sydney and Maurice and accidentally wrecked the spa.
He later battled Crystal Fist until he got distracted and scared by the tentacle shapes that he created.
In Franken-Fight, Humungousaur was briefly seen in video footage battling 'Wreckingbolt'.
In Cyber Slammers Humungousaur battled Steam Smythe and accidentally wrecked the Biggie Box store.
In Billy Bajillions, Humungousaur helped the Forgeti remove the snow.
In Show Don't Tell, Humungousaur battled Hex and broke a spell he casted on Gwen.
In Bridge Out, Humungousaur helped Simon move some cars.
In King of the Castle, Humungousaur stopped a chandelier from falling on him and the others.
In Moor Fogg, Humungousaur battled the Fogg monster, but timed out.
In This One Goes to 11, Humungousaur defeated Kevin Levin as Wreckingbolt.
In Innervasion Part 5: High Override, Humungousaur was added to the active playlist due to the Omnitrix's reboot.
His large size also means he's slow, is an easy target and can't fit in tight spaces. Humungousaur's tail can cause unintentional damage if he doesn't watch what it hits. Humungousaur's tail is powerful enough to create shockwaves when he slams it against the ground. He possesses a thick, armored hide, which has proven to be durable enough to withstand blaster fire and heavy impacts. Humungousaur possesses incredible strength. Humungousaur wears the Omnitrix symbol on his chest. He also has two green eyes with thick black outlines. His teeth are yellowed and minorly fanged. Both his lower jaw and brows are protruding while his almost human-like nose appears to be squished inward. His square-like head is mostly hunched forward and the beige area of his neck is wrinkled. His knee caps and finger joints also bulge out. He has three fingers and a thumb on each hand and three black, elephant-like toes on each foot. The mace has three spikes shaped like stalagmites, being one large spike on the middle and two smaller spikes on the sides. Dark grey, stone-like spikes, each shaped like the dorsal fin of a shark, run down his spine from the top of his neck to a black mace on the end of his tail. He has a beige chest, abs, inner arms, and lower jaw. His armored hide is light brown, with minor plating on his shoulders, tail, back, arms, and upper legs. He has elephant-like feet and a lengthly lizard-like tail. His body is somewhat humanoid and muscular with two arms and two legs. Humungousaur is approximately 12 feet tall.