Zeref, Fairy Tail. I don't know if he's a super villain by definition but if we combine him with Acnologia they would definitely wipe out all the things in the world (not that i would want to take it over afterwards with the two of them around)

madara uchiha from naruto esp with his juubi :)

The nine tail fox from Naruto!(Kurama) Yea one blast from his chakra ball and the rest is history.

I would choose Lelouch Lamperouge!

I say we send the evil Fire Lord over to that planet and have him burn them all down! xD Or maybe he could direct Sozin's comet there and just wipe out the entire planet...o.o

~S.G~

In the immortal words of Gigguk, "If you think Light Yagami is the master of manipulation and deception, then Johan [Liebert] is the undisputed god."

I'd recruit Colonel Shultz from the 1974 Space Battleship Yamato T.V. series because his Reflex Gun could send radioactive meteors to pollute the planet's atmosphere to the point of making all life there unhabitable, though it would take 365 days for the radiation polluting the planet exterior to enter the core and kill off any living being hiding there.

i think Sailor Galaxia would do

@KeenHavoc:

Is there anything that a zombie apocalypse can't do?

I would go with either Naraku from Inuyasha or Sephiroth.

@FaithlessFighter:

That, and for some reason they've really stepped up their game as of late (I haven't seen the later 5th gen episodes, so I don't know if they're still being competent villains or not). But it's really made them less funny and a little less likable, IMHO :/

Or you could just use Team Rocket from Pokemon. Theyre immortal.

I say we just let Kid Buu out of his cage. He'll blow em up in one episode while it would take any other villian several seasons or a couple of episodes.

Father from FMA, because then you also get Lust, Envy, Pride, Sloth, Gluttony, Wrath, and maybe Greed.

I'd have to say Yami Bakura from the original Yu-Gi-Oh. He could shoot aliens with his Millenium rod. Actually I'd ask Jafar for help. I know he isn't an anime villain but I think he'd get rid of the aliens with some pretty cool magic. Or maybe Hell Johan from GX. He could use the Dark Gem Beasts to attack the aliens. I don't know.

@nimbusoak:

Heh. Toguro would be an interesting choice. Kill, rip apart, kill. . Finished with this and still didn't get to use 100%

I would find it fairly amusing to unleash that guy from YuYu Hakusho that looks like Arnold Shwartzennager on them. It wouldn't really be all that effective, but why not?

@ChibiSasuke:

Though knowing him he would probably end up becoming their emperor and then using them to crush Britannian lol.

Lelouch could just tell them all to kill themselves. 8u

@silvershriek:

Sounds good to me. Why waste them when you can make them your slaves?

I can't believe nobody's touched this yet:
Pain hands down!

@Adam:

Oh Daleks, for sure. I know its an obvious answer, but its he right one. They wouldn't be able to tolerate anyone else muscling in on their job to be the evilest baddies in the universe. ;)

I would ask either the main villain of airia the scarlet ammo(can't remember the name) or I would ask cell.

I'd ask Obito, just cause he's awesome

The Noahs from D-Gray man, and if just one.... Rhode or Tikki~

I'd ask Frieza.

I'd ask Millions Knives from Trigun, because then you could get the Gung-Ho Guns as back-up. But then again, Knives could probably obliterate their entire planet by himself.