You can't.
the sea incense is found somewere in cerulean cave(which is in kanto)
Breed Marrill/Azumarril with Sea Incense attached.
it s found on the first floor of cerulean cave.
Breed two azumarill's one holding a sea incense item once you obtain the egg and hatch you should get azurill if you don't you need to have ruby, sapphire or emerald do the exact same method as above to get azurill.
That item doesn't exist in leafgreen their is a sea incense and lax incense in the cave.
Sea incense is found in lost cave.
If it's held by a Pokemon it will boost Water type moves.
You can't.
put it on a Pokemon
you cant
Sea Incense can be found in the cave called Lost Cave on Five Island. Inside the cave go right, up, down, up and take the item.
U look for it
the sea incense is found somewere in cerulean cave(which is in kanto)
there isn't a Pokemon game called "Blue Sea"
Breed Marrill/Azumarril with Sea Incense attached.
no you can receive it in the mountain next to lillycove Hope this helped =]