Why would you release it is the question I want to know but, unfortunately you can't recatch it if you release it.
No, the only thing that can be nearly as rewarding is getting a life
Once, with the liberty ticket, and again with the release of Victini and Reshiram/Zekrom
You can't. You have to get Victini with an event.
No, Victini doesn't evolve.
No, Victini is unbreedable.
No, victini is an wi-fi event pokemon.
victini
You have to transfer Victini across from the original Black or White.
Victini cannot be found on Black 2 as the event was only for Black and White.
Victini cannot be caught in Pokémon Black 2.
Victini cannot be found in Pokémon Black 2.
"Pokémon the Movie: Black-Victini and Reshiram and White-Victini and Zekrom"