I agree with the Imgurian who said Grumpy Cat should be Voiced by Alan Rickman in the Disney version.

Source: http://imgur.com/sekdh

A Grumpy Cat Tard Toon! "I hate it!"

Source: http://imgur.com/ujiI7

Tard the Grumpy Cat Cartoon, saying STFU: 

Can a Disney version be far off? Pixar maybe?

Grumpy Cat Cartoon gif:

Source: http://imgur.com/gallery/ZohOS

Source: http://imgur.com/Ogl10Lb

CG Grumpy Cat! I love it.

Source: http://imgur.com/gallery/At5kYCQ

Clean version: http://imgur.com/RwHVUTC

What ever happened to this?

Source: http://imgur.com/UkAXy

Still waiting for OP to deliver.

http://pandawhale.com/post/12067/grumpy-cat-disney-animation

All grumpy cat animations get my upvote!

Source: http://imgur.com/NEvwuSP

I am still hoping for a Grumpy Cat animated series, though.

Will let you know if I hear anything.

See also:

What breed is Grumpy Cat?

Is Grumpy Cat a boy or a girl?

The best Grumpy Cat gifs 

In the meantime, I will enjoy these: http://pandawhale.com/post/11586/dat-grumpy-cat-walk

Grumpy Cat in Disneyland:

http://pandawhale.com/post/31206/grumpy-cat-found-her-boyfriend-at-disneyland-gif

If Grumpy Cat were in Disney movies:

http://pandawhale.com/post/31236/classic-disney-animated-films-now-with-grumpy-cat