in route one are you serios or are you asking random questions =o
You can't catch a sentret in Ruby version, but you can catch one in Emerald version.
Only by trading from LeafGreen and/or FireRed
Sentret is found near a town farther from Snowpoint City.
Yes, You can catch Groudon in Pokemon Emerald.
You can't catch one 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.
You can't catch or obtain other trainers Pokemon in emerald.
Cressilia is a 4th generation Pokemon so you can't catch it in Pokemon Emerald.
u can get 1 near new bark town
No you cannot catch Celebi in Pokemon Emerald.