You can't catch entei in Pokemon black he is on a different version
no, you can transfer it from coliseum though, or you can get it from an event.
no but you may catch Rayquaza, Groudon, Kyogre, Deoxyes and Jirachi.
in which pokemon version ? in pokemon emerald you can catch it 70lvl.in pokemon ruby you can catch it 45lvl
use a masterball
You can't catch Entei in Pokemon platinum. He's a Johto Pokemon. You have to transfer Entei from a GBA Pokemon game.
You can't.You have to trade it from Pokemon Ruby Version
There are 5. Entei, Suicune, Raikou, Ho-oh, and Lugia.
You trade a Charizard of Pokemon leaf green version or firered version
You can't: you can only get it in a trade from a person with either Pokemon sapphire version or emerald version.