Reaperman Wompa:
A computer and a dog. It would have:

1, The ability to use any voice
2, Anything a computer can do

Pretty much R2-D2 with fur, the ability to talk and snuggliness.

You would build K-9 essentially?

Manbro:
Imagine you are a mad scientist and before you sits a creature creator? What creature would you create, why and what powers/attributes would it have?

I would create a Jesusaurus Rex (pretty sure I'm going to hell at this point). Half Jesus, half Tyrannosaurs Rex. It would have Holy powers and laser eyes, as well as being carnivorous.

i would create either hot hentai chick no. generic schoolgirl
or god

i like the Chopper idea someone mentioned, but I would make a cow....with firebreath....and instead of milk it would make....pudding....yeah

I want a creature which simultaneously takes the form, shape and behavior of everything everyone has mentioned so far. It would likely kill me just by existing, and everyone else at the same time, but it would be the most bad-ass apocalypse there ever was.

And it would sing Cab Calloway style.

-Xenomorph (a.k.a. Giger's Alien or The Alien)
-Horta (GEEK ALERT)
-Sarlacc (because everyone needs a giant pit creature of doom in their backyard to feed their enemies to and let them be digested for a millennium

zhoomout:
Moonpig!!!

Ahhh good God no! I've got that insufferable jingle in my head now! Bugger, looks like I won't be getting much sleep tonight...

Either a unicorn so that I could clean waters for poor Africans, or the ideal boyfriend.

No, wait! The ideal boyfriend who had the power to purify water for poor Africans!

MONTGOMERYWOODRUFF69:
A political figure who isn't full of shit...

That's a bit far fetched.

Ultrajoe:
I want to see what happens when a gorgon and a basilisk lock eyes.

If it creates a creature, i want it to be that one.

A snake with a mane of serpents.

Ultra.

That is genius!

Molikroth:
God.

That's a pretty good idea. I read somewhere though (can't remember which book) that some guy had already thought of imaginary creature. Good try though.

AuntyEthel:
A half cow, half pig. Just to eat it.

Hell Yea! If only such a creature existed, there would be no need for any other kind of meat! Brilliant.

A Giant flesh-eating Kangaroo,covered in armor, and I would be the only person who could ride it.
I would name him Gunter

SecretTacoNinja:
There is already the perfect animal...
And he goes by the name of:...

Spoiler: Click to View

A human Reindeer, that can talk, and transform into seven other forms.
And he is, dare I say...
... Kawaii? :D

Not to mention that he is as qualified and passionate as an doctor I know.

I would go for a cyclops buddy.

Well, I was gonna show a couple of my spore creatures, but it seems the two that I wanted aren't listed in the master database.

I'd totally create Max Rebo!

Tarrasque

imagine that, tying a tarrasque to a blimp and raining down havoc.

i would make an aquatica.

it would have the power to freeze, boil, evaporate, codense, and melt(if frozen)
also it would be able to turn into water and heal itself by turning into water.

it would be humanoid but have blue scales, gills and lungs, ear fins, solid black eyes, webbed feet, claws, and would always wear a white, dark blue, and light blue bathing suit

also i would give it the power of being psycic and able to change into a human

i wish i could do that (daydreaming) Aaaaaaaaaaaaaaaaaahhhhhh..................

dragonjoe90:
i would make an aquatica.

it would have the power to freeze, boil, evaporate, codense, and melt(if frozen)
also it would be able to turn into water and heal itself by turning into water.

it would be humanoid but have blue scales, gills and lungs, ear fins, solid black eyes, webbed feet, claws, and would always wear a white, dark blue, and light blue bathing suit

also i would give it the power of being psycic and able to change into a human

i wish i could do that (daydreaming) Aaaaaaaaaaaaaaaaaahhhhhh..................

also i would make a firus(fI-Rus)

it would have the ability to move, increase heat of, create, cook with no heat source, and change into fire.

it would be humanoid in form but have red and orange scales, be able to breathe fire, holes for ears, solid yellow eyes, and it would have dragon wings, it would wear street clothes, with holes in the back for its wings

also it would be psycic and able to cange into a human

i wish i could cange into this and a aquatica (daydreaming) aaaaaaaaaaaaaaaaaaaahhhhhhhhhh........................