you cant find it you have to migrate it from Pokemon leafgreen or Pokemon FireRed.
You have it already.
You already have it.
Yes.
No, but you have to have the National Pokedex to find the special item
You don't get the national dex until you beat the elite four and yes, you have to have the national dex to get him because entei is a distant legendary you can only find in the early games. So you need the national dex, but not before you beat the elite four.
get a action replay
find him in the ND(national dex)
when you beat the elite four and have 100 Pokemon go to professor oak and he will give you and Gary the national dex
you should find every Pokemon in sinnoh. i going to find all the pokemons in the national dex ;)
Get the National Dex. Which means you have to find all of the Pokemon in the Sinnoh dex. Then go and find Professor Rowan in Sandgem Town where you'll end up getting a National Dex with all the Pokemon on it.
After you find all of them i believe you go back to the professor or her father and you get the national dex. At which point you have to find the rest of them. Have Fun!
You get them in Snowpoint temple after you get the national dex.