Verified answer

Pick a Keldeo here:

http://www.pokecheck.org/?p=search&pokemon=647

Go here to learn how to get it:

http://www.pokecheck.org/

If you're having trouble, message me.

First of all, Meloetta is very cool. Like Keldeo, it can change formes when it learns its special move.

Even though you missed the event, you don't have to cheat to obtain a Keldeo. It's very easy to obtain a legitimate one, just visit Gamefaqs (link below). Put in a request at their Pawn Shop topic and someone there will give you the event Keldeo for free.

You can cheat for one easily, you just have to google how to do it. You could trade for it but honestly, people will be wanting a lvl 100 pokemon that is hard to obtain or a legendary. Another thing you could try is a pokemon forum and ask if anyone there would be willing to trade for one if you want a legitimate version.

I am not 100% if this is the site to create your own pokemon that I used because it was so long ago but the procedure sounds the same and it was also recommended to another similar question.

http://pokewifi.livejournal.com/2167924.html

Good luck!