Now I don't know if The Ink Tank team are still accepting alien ideas but I thought I'd share a few of mine here anyway. So here we go
1. Mimic. Mimic is a Duplisapian from Hathor (Like Ditto). He has the ability to copy his opponents powers and fighting style. NOTE: Mimic can only copy 1 person at a time and CANNOT copy alternate Ben's transformations (I thought it would be too OP if Mimic went up against a Celestielsapien). Mimic's powers are based on the combination of a Skrull and Taskmaster both from MARVEL. His species is a play on the word duplicate
2. Guardian. A Novarian from Xandar, Guardian has multiple powers. He is based on the MARVEL character Sentry and has the same powers as him. The powers can be found here. His species is a play on The Nova Corps and his planet is the planet of The Corps both from Marvel comics
3. Rept-Alien- ReptAlien is a Madfall from the planet Laighairt. He is a tall lizard like alien with sharo serated teeth. ReptAlien has superhuman strength, speed and senses, invisibility, regeneration, sharp claws and teeth and he can breath underwater. However this form is low in intelligence. He is based off Lizard and Killer Croc from MARVEL and DC respectively. His name is a play on Reptilian and his species and planet come from the Welsh and Irish for Lizard respectively.
4. Loud Mouth- Loud Mouth is an Atomite from the planet Atmos-5. Each Atomite has a unique ability to themselves. Loud Mouth's genetic sample had an ability known as a Hypersonic Voice meaning even the tiniest whisper could destroy a continent. A word spoken at normal volume can split starships and small planents and a scream can crack a large planet open like an egg. Loud Mouth also has superhuman physical abilities and flight. The Omnitrix fitted him with a device the allows him to communicate telepathicly. Loud Mouth was based on Black Bolt from MARVEL. His name comes from his power.
5. Gargoyle- Gargoyle is a Cadmus from Cadmuria. He is a hulking brutish beast with incredible strength, speed, agility, durability and stamina. He also has a fast rate of adaptation and regeneration as well as spikes all over his body to use as melee weapons. Gargoyle's most powerful ability is his immunity to death. Even if he is killed he'll regenerate and then be immune to whatever killed him. Gargoyle is based on Doomsday from DC. His species and planer is based on the facility the created him in the Justice League/Justice League Unlimited Cartoon.
6. Lifeflow- Lifeflow is a Ignisavem from Ignisava. Resembling a large flaming humanoid with wings lifeflow is the last of his race as Ignisava was destoyed by The Highbreed. Ignisavi (plural of Ignisavem) manipulate cosmic energy via absorption and channeling it to do incredible feats of strength, speed, agility, and stamina. As an Ignisavem Lifeflow is capable of this. He also has telepathy and telekinetic powers. One of these powers is Psychic flames which cause unimaginable agony to the victim. He can use his telekinesis to fly and levitate. His name comes from cosmic energy being close to Mana or Chi. Ignisavem means flaming bird in Latin and Lifeflow is inspired by The Phoenix Force from MARVEL.
7. TechnoVore- TechnoVore is a Virusian from the planet Viru. TechnoVore looks like a large glitching pixalated humanoid. His powers are to hack into any form of technology download everything on it then destroy whatever he just hacked. This ability can also be used offensively to destroy weaponry or spacecraft. TechnoVore's name comes from the parasitic villain from MARVEL. His species and planet are both plays on the word Virus.
8. HellSpawn- HellSpawn is a Daemon from the planet Daemos (I'm a Whovian as well as a MARVEL geek). His powers are extreme and the species's potential has been called godlike. Originally this species were parasites but have since evolved. Hellspawn has extreme strength, speed, agility, durability and senses. These abilities are potentially infinite. Hellspawn also posses telepathy, pyrokinesis, weather manipulation, the ability to grow in size, and plague summoning. The Omnitrix outfitted HellSpawn with 2 chains that can conduct his flames. HellSpawn is inspired by Ghostrider from MARVEL. His species and planet are taken from Doctor Who.
9. Pontus- Pontus is an Atila from the planet Atilan. Atilan is a oceanic planet much like Picess. Pontus has enhanced physical abilities, can breathe underwater, move rapidly though water, posses increased physical abilities underwater, can communicate with all forms of aquatic life and has hydrokinesis. Pontus cannot generate water but he can control it. With training Pontus can potentially control the water in blood, toxins and in the air. However Pontus's abilities tire him out the more he uses them and his strength out of water is barely beyond a peak human. Pontus's name comes from Greek Mythology of the Primordial Pontus. His planet comes from MARVEL.
10. Devourer- Devourer is an Elder from near the beginning of the universe. He is a giant being of cosmic energy and can channel this into ferocious and powerful attacks. Devourer seems to have no clear limit as to what he can do. However this form comes with the major drawback of needing to consume planets to recharge his powers. This form is dangerous and his genetic template is a feared being. Devourer is inspired by Galactus of MARVEL.