I don't think it is possible unless there is some CrAzY cheat on the action replay or other cheat programs.
You can copy a master ball on Pokemon Emerald by having one of your friends that has one sign on to their ds and connect the two. Then they can give it to you in the Pokemon center.
No. In Pokemon Emerald Version, you can only obtain Pokemon from generations 1, 2 and 3.
Red version was not made to migrate with emerald.
No.
NO you can not play Pokemon emerald in Coloseum.
ya it got couple Pokemon that emerald version doesnt have
No you cannot catch Entei in Pokemon Emerald.
Get it from Pokemon emerald.
You cannot get Regigigas on Emerald version.
Buy it.
gamestop
Emerald can trade with Leaf Green but not Pokemon Red