The in-game event? Any time you bring a Fateful Encounter Genesect to P2 Laboratory.
IRL event that lets you get a legit Genesect? Probably years from now.
And yes I'd say he's good, but not great. He's pretty good in the special attacking department and is #15 in PO's Dream World tier, but his troll tier base 99 speed and awful physical movepool hold him back a lot.
Which is to say, we have no freaking clue when the Genesect event will be. They haven't even officially announced Keldeo's existence in Japan yet, and Keldeo is two spaces earlier in the Pokedex. --- Creator of Jay's Journey (see quote!) "Game Series 1 is the best because it set the stage for better games!" - Nostalgia whores everywhere
The Genesect Event just seems to be taking a Fateful Encounter Genesect to P2 Lab, battling a scientist, and getting two Elemental Drives for Techno Boost. Genesect has no Legendary music when encountered in the wild, so the event will more than likely give you one.
You also get a little backstory on why Team Plasma doesn't use Genesect for its goals. --- Silence is golden. :3 The Official Supreme Overlord Blue Mage of all boards.
To activate the Meloetta Event, take a Fateful Encounter Meloetta to the cafe in Castelia City. The guitarist will teach it Relic Song, which allows it to switch in between forms. --- Silence is golden. :3 The Official Supreme Overlord Blue Mage of all boards.
To activate the Keldeo Event, it appears that you must first capture Keldeo in the wild (it has Legendary Battle music). Once you do so, take it and the other three Musketeers to the Moor of Icirrus. The Musketeers will teach it Secret Sword. --- Silence is golden. :3 The Official Supreme Overlord Blue Mage of all boards.
if keldeo isnt in the current movies in july , genesect will be released in jpn in 2014 --- Currently trying to get shiny sinjoh dialga ,enigma latios . Srd 120 times for dialga , battled enigma latios 1840 times,sr'd 3570 times to have catched kyuremu
Assuning they release one event legendary a year at the movies like gen 4 (darkrai in 2007 in jpn, shaymin 2008 etc) then keldeo will be next year, then meloetta in 2013 , then genesect in 2014 --- Currently trying to get shiny sinjoh dialga ,enigma latios . Srd 120 times for dialga , battled enigma latios 1865 times,sr'd 3570 times to have catched kyuremu