(images from official sources)

Heatblast

Species: Pyronite Home Planet: Pyros

Notable Abilities:

Pyrokinesis

Flight (either unassisted or surfing on a chunk of earth)

Enhanced strength and durability

Absorption of fire/heat

Limited Pyroportation

Notable Weaknesses:

Water/fire extinguishers (needs a moment to reignite)

Requires focus to keep body cool enough to be safe to touch

Fireproof enemies

I figured I’d kick things off with the very first alien Ben ever transformed into! Heatblast is a pretty versatile choice, good for both close brawls and long range attacks. He’s got a bit of a deeper voice, but otherwise speaks with the same tone and cadence as Ben. He doesn’t use him as much, after getting more powerful and more specialized options, but a classic is a classic.

Grey Matter

Species: Galvan Home Planet: Galvan Prime

Notable Strengths:

Insanely, ridiculously intelligent.

Creative problem solver

Strong for his size

Sharp teeth

Slimy, hard to grab

Microscopic pads on fingers and toes make for an excellent wall climber

Amphibious, functional gills allow underwater breathing

Notable Weaknesses:

Mason jars

He is like six inches tall

A cat looks at him and sees a tasty snack

Strong for his size isn’t saying much

Who doesn’t love the tiny bitey frog guy? Galvans are renowned for their high intellect, and a human turned into Galvan is no exception. Even if Ben winds up saying things he doesn’t actually understand, just leaving it up to his transformed brain’s instincts. Somehow he still hasn’t thought to use this guy to unlock the master controls on the Omnitrix, unlike his future son in the series that’s pretty much the first thing he does with his Grey Matter. Voice is a fun blend of high pitched and gravely. It’s so fun watching him absolutely wreck shit just by being tiny and doing things his opponents don’t expect. It’s just a fun watching him get shoved in a jar because he’s so dang tiny and he throws a fit about it.

XLR8

Species: Kineceleran Planet: Kinet

Notable strengths:

Super speed like you wouldn’t believe; fast enough to create vortexes, run on water, and up vertical walls

Face shield (biological; it’s part of his skull) provides immunity to gasses

Sharp claws that can work like spears or scissors

Enhanced dexterity, agility, and reflexes

Can think as fast as he moves too

Can stop on a dime and make 90 degree turns no matter how fast he’s going

Notable weaknesses:

Can’t handle all surfaces; slippery slows him down drastically, sticky/muddy can easily get him stuck

Tail is a weakpoint

Great timing and reflexes can counter his speed

That speedy thinking? Can make it hard to focus, easily distracted

Who doesn’t love this lizar man, to some degree? Pronounced the same as “accelerate.” The balls on his feet aren’t actually wheels. There’s a buzzing to his voice, and it’s a bit raspy. I don’t remember him ever using the spikes on his elbows for anything but there they are! His tail is prehensile. You really don’t want to get speedy-kicked.

Diamondhead

Species: Petrosapien Home Planet: Petropia

Notable Strengths:

Crystal generation and manipulation; can fire chunks of crystal, turn arms into blades or shields, create crystal constructs from the ground up, ect.

Most light-based weaponry (lasers, beam attacks) just reflect/refract off

Enhanced strength and durability

Capable of surviving in outer space

Minor regenerative capabilities

Notable Weaknesses:

If hit with enough force, can still crack and shatter

Vulnerable to sonic-based attacks

Crystal Pepsi Man. My absolute favorite thing about Diamondhead is the soft tinkling noises he makes whenever he moves. His voice is a lot deeper, but like with Heatblast, he talks about the same as Ben. He is a powerhouse, though not always the best choice for every situation. Still, Diamondhead good. Big beefy organic crystal man. Pointy. Has absolutely gotten his back spikes stuck before.

(images from official sources)

Wildmutt

Species: Vulpimancer Home Planet: Vulpin

Notable Strengths:

Extremely powerful sense of smell

Very keen hearing

Able to combine the two for a clear “vision” of his environment

Immune to sight or light based attacks

Enhanced strength, speed, agility, and durability

Sharp claws/teeth

Can climb anything his claws can pierce or grip

Notable Weaknesses:

Susceptible to sonic based attacks

Lacks physiology to speak, can only bark/snarl/growl

Impeding his sense of smell can render him “blind”

PUPPY!! What the pictures don’t convey is how slobbery this good boy is. Also those lines on his neck aren’t wrinkles; those are actually how he smells, they’re basically nostrils. Apparently, Vulpimancers grow tails as they age, and also gain the ability to use those little spikes as porcupine-like quills, both to fire off as an attack and to (somehow?) enhance their sonar. My Ben’s not quite got that part figured out, but he has a tail growing in now.