I don't think dragon pulse is in Pokemon emerald, sorry.
The strongest dragon type in pokemon Emerald, Sapphire and Ruby, is the legendary pokemon Rayquaza. In terms of non-legendary pokemon, both salamance and flygon are strong dragon types.
yoursadasking about pokemon
The Dragonscale is an item in Pokemon Emerald version. There is a chance that certain Pokemon such a Horsea will be holding one when you catch it.
Dragon and Ice types are super effective.
I don't think dragon pulse is in Pokemon emerald, sorry.
Slalamence
gyados
The strongest dragon type in pokemon Emerald, Sapphire and Ruby, is the legendary pokemon Rayquaza. In terms of non-legendary pokemon, both salamance and flygon are strong dragon types.
yoursadasking about pokemon
You can get it by wild Pokemon such as seahorse (not always) and any other dragon type Pokemon.
Dragon and flying
The Dragonscale is an item in Pokemon Emerald version. There is a chance that certain Pokemon such a Horsea will be holding one when you catch it.
Dragon and Ice types are super effective.
Dragon dance cannot found on a TM.
well the strongest Pokemon you can catch is raqazza a legendary dragon Pokemon
you mean raquaza? look on pokemon walkthroughs.com