from my knowledge there is no such thing as devihell in any Pokemon game that's even been to a store nor even spoken of online. if someone tells you it's real then it's fake. i should know, I've heard of all the Pokemon in most of the games and learned what ones are real and what ones are fake and or hacked stuff like cathing Mario in pearl version. and if someone says to through stuff away and release certain Pokemon to catch a certain Pokemon then don't listen to them because it doesn't work unless it's fake/hacked mumbo jumbo that was set to do stuff like that. also like how people hacked legendaries only obtainable through mystery event.
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.
No you cannot catch Celebi in Pokemon Emerald.
you cant. You can only catch it in Pokemon emerald, but, you cant catch latias in 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
You cannot catch Entie in Pokemon Emerald. You can catch Entie in FireRed, LeafGreen, HeartGold, and SoulSilver. You can trade Entie to Emerald from FireRed and LeafGreen.