They are hosted on Data's website and are used in a program created by Data that costs money.
So, he is responsible.

Technically Data shouldn't/wouldn't even allow a mod like this to be hosted on his website.

Someone make Captain Falcon.
And make sure his punch is overkill nuclear like so:

http://www.youtube.com/watch?v=FFtw7qW7Vcw

Wooooah.

@ Plagiarism discussion
You guys happen to forget that Numgun made an arwing, based on the one in Star Fox.

And he made it an official AAL product.

actually

you are forgetting that we really don't care

if we want to cite numgun for plagiarism go ahead and indict all of his ♥♥♥♥ products

We have no jurisdiction. What could we do if we even wanted to (based on the supposition we care)?

We could report it to some one that has jurisdiction in the matter.
They probably wouldn't care either.
And this is how it is, in practice, generally acceptable.

i heard kirby swallowed a dropship..