This is seriously stupid of you to attempt to fight katy perry's (arguably her label's) legal team. They own the copyright on the character, you WILL lose in court, and they will make an example out of you. Assuming you haven't gotten a subpoena already, you should shoot them an email apologizing and take down the files. If you've already gotten a subpoena, I guess you're SOL.
Oh, and your little statement "Lawyers didn't make #leftshark famous the people DID" is entirely untrue. Do you know what it costs to make the halftime show on the superbowl? And, if "the people" made the shark famous like you say they did, why didn't you just give out the file for free before you got the C&D from their legal team instead of trying to capitalize on it beforehand? Had you just stayed away from attempting to profit off of this, you wouldn't be in this mess.
Good luck in court. You're gonna need a lot of it.