There is not an official event yet for Keldeo, but there is a way to get it with an Action Replay however, but I don't know the code for it however, sorry. Hope this helps!
Keldo comes in pokemon black and white version 2
It has not yet been announced when Keldeo will be available for download in Pokemon Black Version and Pokemon White Version.
Keldeo is a real pokemon. Incidentally, keldeo was introduced in Pokemon Black and White.
When is there going to be a keldeo mystery gift in pokemon black and white.
No one
In an event. I think in this month
no
ok Keldeo is out in Japan..but probably around Autumn this year, when pokemon black/white 2 comes out.
By Transferring the Pokemon from your Unova games. That is, unless you can convince someone to trade you theirs.
There are Victini (Event), Virizion, Cobalion, Terrakion, Tornadus (From Pokemon Black), Thundurus, Landorus, Reshiram (From Pokemon Black), Zekrom, Kyurem, Meloetta (Event), Keldeo (Event), and Genesect (Event).
you need AR (action replay)
it evolves if you transfer it from Pokemon black or white to Pokemon black 2 or white 2