In Pokemon Emerald you cannot.
Once you obtain your 8 Johto Badges, go to Ecruteak Dance Theater to battle the Kimono girls. The first one you face has Umbreon. Also, in the Pokemon league, Karen, #4, has an Umbreon.
he stays in the elite four as champion
You can see most of the ones you listed when challenging the Elite 4.
You have to go to the Elite 4 to get an eevee.Trust me. it took me 3 years to figure out that you can only get them in the Elite 4, because my brother found 18 in the Elite 4, but nowhere else.
in the desert after you beat elite 4
You can find the elite four at Ever Grande City
Once you obtain your 8 Johto Badges, go to Ecruteak Dance Theater to battle the Kimono girls. The first one you face has Umbreon. Also, in the Pokemon league, Karen, #4, has an Umbreon.
Get them up to atLEAST 55
there is none
In the elite 4
no
To get an Umbreon, you must gain high friendship with an Eevee and level up at night.
you cant find it. get an eevee, max its happiness, level it up at night, and tada! you have an umbreon!
he stays in the elite four as champion
You can see most of the ones you listed when challenging the Elite 4.
You have to go to the Elite 4 to get an eevee.Trust me. it took me 3 years to figure out that you can only get them in the Elite 4, because my brother found 18 in the Elite 4, but nowhere else.
#197- Latios - you can find it after you beat the elite four.