You have to trade them from ruby, sapphire or emerald.
No.
there are none.
ImpossiBle Unless you trade them to leafgreen or firered which sux
trade from emerald
All 3 of the Regis are level 40.
Only Regis in Pokemon EmeraldYes.Those Are The Only Regis In Pokemon Emerald. Too Bad.there are regi in ruby and sapphire and regigigas in d/p/pt
island 3
Venusaur
No you can't but you can get them in Platinum Emerald Ruby & Sapphire I think so or maybe Firered & Leafgreen too you can only get Reggigigas in Pokemon diamond in the snowpoint temple.
Yes you can trade leafgreen version Pokemon to another leafgreen version.
There's only 3 regis.
There is no Mew 3.