Corsola.
you can catch corsola by fishing with a super rod in cianwood city while having the sinnoh music on.
Swarm. Route 230 in the grass.
Yes, You can catch Groudon in Pokemon Emerald.
You can't catch one in Pokemon Emerald.
you use the good rod in a river or somewhere :/
Corsola.
Corsola
you can catch corsola by fishing with a super rod in cianwood city while having the sinnoh music on.
Swarm. Route 230 in the grass.
You can't catch one in Pokemon Emerald.
Yes, You can catch Groudon in Pokemon Emerald.
You can only get a Corsola by trading it from Ruby, Sapphire, or Emerald. You can find Corsola in RSE by fishing in Route 128 (super rod), and by fishing at Ever Grande City (super rod)
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.