Question

Is there any way to get Keldeo in Black 2 and White 2?

Answer 1

Keldeo is obtainable through the DNS Exploit in Black 2 and White 2, which uses fan-hosted servers to access old Mystery Gifts. For help with setting up the exploit, reference our detailed guide. A Keldeo obtained through this method is legitimate and will pass hack checks.

Answer 2

Not at the moment, no. The only way was to get it from the event at Gamestop/Game/EB Games stores in Black/White, then you could of course trade it to BW2.

But that event has finished now, and there is a Genesect one for BW2. Maybe there will be a future event, or you can trade with someone who has a Keldeo.