unless you can trade for starters you are good you can catch them in the wild except the starters and if you are using vba you will have to find a code for that starter.
You can't catch one in Pokemon Emerald.
Yes, You can catch Groudon in Pokemon Emerald.
No you cannot catch Entei in Pokemon Emerald.
You can't catch a Bellsprot in Pokemon Emerald. You trade it from Pokemon Leafgreen!
There are many Pokemon you catch that are similar in sapphire and emerald but there are many Pokemon emerald can only get and not sapphire.
Cressilia is a 4th generation Pokemon so you can't catch it in Pokemon Emerald.
You can't catch or obtain other trainers Pokemon in emerald.
Steal it from him. Steal it from him. Steal it from him.
you cant. You can only catch it in Pokemon emerald, but, you cant catch latias in emerald.
No you cannot catch Celebi in Pokemon Emerald.
You can onl catch LUNATONE in SAPPHIRE but you can catch solrock in emerald
imposible there is no such thing as bonsly in Pokemon emerald