Ben has access to 10 original alien forms and 12 other alien forms that he can transform into using the Omnitrix watch. The original 10 are Diamondhead, Fourarms, Ghostfreak, Grey Matter, Heatblast, Ripjaws, Stinkfly, Upgrade, Wildmutt, and XLR8. Each alien form has unique abilities and strengths but also weaknesses. The document provides a brief description of the abilities and planet of origin for each of the 10 original alien forms.

3. BEN ALIENS
ORIGINAL 10 OTHER 12
• Diamondhead • Articguana
• Fourarms • Benmummy
• Ghostfreak • Benvicktor
• Grey Matter • Benwolf
• Heatblast • Buzzshocker
• Ripjaws • Cannonbolt
• Stinkfly • Ditto
• Upgrade • Eyeguy
• Wildmutt • Spitter
• XLR8 • Upchuck
• Waybig
• Wildvine

4. ENEMYS
• Acid Breath • Kevin 11
• Dr. Aloysius Animo • Kraab
• The Big Tick • The Limax Aliens
• Charmcaster • Megawhatts
• Clancy • Mr. Jingles
• Enoch of the Forever Knights • Phil
• Frightwig • Six-Six
• The Fungal Brain • Slix Vigma
• Hexlord the Magician • Thumbskull
• Howell Wayneright • Vilgax
• Joey / Rojo • Vulkanus
• Jonah Melville • Zombozo the Clown

5. GWEN

6. Heatblast comes from an alien race that
inhabits a star, rather than a normal planet. As
a master of the manipulation of extreme fire
and heat, he has the ability to quickly project
bolts of fire from his hands and mouth, and
create balls of fire that he can throw or roll. He
may start a fire quickly, but he can put one out
just as fast. Unfortunately, like any other living
fire, he can be put out when an excessive
amount of a fire retardant is used. It's surprising
that he has survived from tremendous amounts
of physical damage, yet he appears to be
unharmed. After all, he is living fire, with an
attitude.
Heatblast is a Pyronite from the star of Pyros.

7. Standing at an amazing twelve feet tall with all
alien muscle, the Tetramand Fourarms is the
hero of choice when Ben has a feel to smash,
throw, or beat up his way through. With four-
arms and tremendous strength, he is the
strongest among the aliens. Not only that, he
also has extremely thick skin, which acts as his
armor. His endurance is extremely high, and
also has the ability to leap great distances.
Unfortunately, his height and strength can be
used by Ben to his advantage, but it contributes
to clumsiness and speed.
Fourarms is a Tetramand from the planet of
Khoros.

8. Ghostfreak is a shadowy, phantom-like alien, and
has a protoplasm that can change its density. This
enables him to phase through matter and turn
invisible at will. He may have only one eye, but he
can position it anywhere on his body, but by using a
track traced along his skin. His appearance can also
bring fear in the hearts of criminals everywhere, and
sometimes, even Ben is creeped out. Ghostfreak can
also peel back his own skin, which reveals a
horrifying mass of innards, but it has yet to be seen.
Direct light and chemicals that can affect his body
will nullify his invisibility and intangibility. He is also
not meant for extreme combat.
Ghostfreak is an Ectonurite from the planet Anur
Phaetos.

9. Galvanic Mechomorphs are an entirely new and
unique species in the galaxy. These biomechanical
beings are living machines with liquid metallic skin
and complex systems of self-forming organic circuits.
Mechomorphs are able to merge with technology and
"upgrade" it into an incredible piece of ultra-tech.
When merged, Mechomorphs can literally bring
anything to life, and are able to communicate with the
apparatus, vastly increasing its functions. While
Mechomorphs are masters of the mechanical, their
powers are useless on living creatures. The plasma
beams they produce come from a series of complex
internal machinations. Being highly sensitive, finely
tuned beings, electromagnetic pulses, acid or any
other sort of corrosive can upset their delicate
chemistry and wreak havoc on their systems.
Upgrade is a Galvanic Mechomorph from the Galvan
B Satellite (moon).

10. The insectoid alien Stinkfly is an expert flyer,
and he is able to pull off amazing acrobatic
moves in the air. He can also take care of
himself in a fight, using his pincers and the end
of his tail as weapons. He also has the ability to
shoot slime from both his four eye-stalks and his
mouth. He can also can carry many times his
weight. Much like our insects here on Earth,
Stinkfly has a very tough exoskeleton, but his
wings are very thin and fragile enough to disable
most of his abilities.
Stinkfly is a Lepidopterran from the planet of
Lepidopterra.

11. With a body stronger than the known diamond,
Diamondhead is the alien hero of choice for
invulnerability and invincibility. Diamondhead has
the unique ability to grow crystals on any part of his
body, making tools and weapons that are extremely
sharp, allowing him to cut through almost anything.
This also enables him to regenerate his own body
from any damage received. He can also fire
diamond shards as projectile weapons. Not only
that, but his body can also reflect weapons that
deal with light and beam. As he is the most
recognized alien to be strongest in defense, the
only disadvantage is that like any other crystal
known today, sonic weapons can shatter his crystal
body.
Diamondhead is a Petrosapien from the planet of
Petropia.

12. Ripjaws is an extraordinary swimmer. Like most
other aquatic creatures, he can breathe
underwater. He has a very large tail with fins that
allow him to swim at incredible speeds. He has
sharp claws, and his large, powerful jaws can be
used to deliver a painful bite. Ripjaws can also
travel on land, though only for a short time,
otherwise he'll dehydrate. Ripjaws may be
powerful, but he is the least used due to his
specialized nature. He may not be as powerful on
land, but he gives Ben the ability to combat in times
where he must be in a water environment.
Ripjaws is a Piscciss from the planet of Piscciss
Volanns.

13. Standing at a mere five inches tall, Grey Matter
comes from the small, yet intelligent Galvan race
of the planet of Galvan Prime. His heightened
intelligence enables him to fix and/or tweak with
even the most complex machinery. His intelligent
mind is of great benefit, and his small body can
enable him to enter small areas and make him
harder to spot. Unfortunately, his tiny body is
extremely vulnerable to outside danger, making
him not capable for combat. However, Ben can
use Grey Matter to disable enemy technology
within them.
Grey Matter is a Galvan from the planet of Galvan
Prime.

14. XLR8 is from the lizard-like alien race of the planet
Kinet, and he is known to have lightning-quick
reflexes and the ability to reach speeds of over
500 MPH. His speed mainly comes from
manipulating friction and momentum, allowing him
to run over almost any surface, including non-solid
and slanted ones. His hands are modified to be
used as slicers, enabling him to cut through things.
XLR8 may be weaker than the other alien forms,
but his speed makes up for it. XLR8 has trouble in
the presence of strong magnetic fields, as they
can disrupt his sensitive nervous system.
XLR8 is a Kineceleran from the planet of Kinet.

15. Wildmutt is from an alien race called the
Vulpimancers, and their superhuman athletic
ability with heightened senses of smell, hearing,
and taste gives them an extra boost in sensory
combat. He has no eyes to directly see his
enemies, though his sense of smell makes up
for it. Unlike the other alien forms, Wildmutt is
the only one that cannot communicate verbally,
but he can grunt, growl, and make noises. The
razor-sharp quills on his back can be used as
projectile weapons, and they can be fired with
accuracy.
Wildmutt is a Vulpimancer from the planet of
Vulpin.

16. OTHER ALIENS