Since the thread has been rebumped anyway, guess I should share this.
For those searching for rare critters, event monsters, dream world abilties, shinies, monsters with perfect IV's, a perfect hidden power ability to suit your needs, or you just want to instantly EV train, or get some egg moves without pain in the butt breeding, or trade between games without having two gameboys (and don't we all want to do all of that?)
http://www.makeawish-gts.net/login.php?ref=606
I've been using this site for about three weeks now, it works pretty great. Works for gen 4 or gen 5.
tips and warnings behind the cut
[hide] Make sure you read the instructions first, and have traded on the worldwide trading center at least once before doing it. (Can be done in any pokecenter in gen 5, only in one town in gen 4.) After that, you'll have to change out your wifi data in the ds, it has instructions for that, and then get your secret id, which is easy enough. (They explain that too.)
Basically it acts as if you're accessing the worldwide trading network and have gotten the other end of a trade… without actually trading. (on ocassion it'll sign off at a bad moment, but your game automatically keeps two saves back and will revert to that if there's a problem... and real worldwide trading has the same problem.)
Every day they cycle in a new critter for gen 4, and for gen 5. There is a request process, though that takes votes (1 a day per user) and a few weeks to run through, and they don't allow anything outright illegal.
You can tweak a monsters move set to do things they don't normally do (like say, a magikarp that can fly) but I would not suggest that, as it may fuck up your game. You can also upload and trade critters you already have and customize them some, and it basically clones them. (So you can keep old faves on gen 4 and still have them on your black/white game.)
If you don't know how evs work... 4 points in any stat equals 1 extra stat point for the critter, and you can put 252 into a single stat... for 2 stats. Or you can distribute those numbers evenly if you prefer, but usually you'll want to pick either all attack or all special, you won't need points in both categories. Speed, defense, or hp after that is up to you. Don't mess with that part if you don't understand it.
Be warned though. There is a huge initial rush when you first get there because suddenly, "oh crap, I can get like, 10 shinies, TONIGHT!" but the downside is... shinies stop feeling special in a hurry. But, if you've always dreamed of a shiny Shinx or Lucario or Sandshrew (Luckily I got one of those months ago so it remains special) then it can get you one.
Its a lot to figure out at once and a bit overwhelming, but pretty simple once you understand it and once you've bene through the process and setup once.
Also, you can register through just the regular site, but I get bonus stuff if you sign up through my referral, so that'd be better.[/hide]