When you catch all the Pokemon in an area..?

Question

After you catch all the Pokemon in an area in ORAS using the DexNav, sometimes you get a golden crown and other times you get a bronze crown, how is what crown you get determined?
I know the game just came out and all, so I understand if I get a delayed/unsure answer

Answer 1

The following comes directly out of Pokemon Omega Ruby & Alpha Sapphire: The Official Hoenn Region Strategy Guide.

"As you catch Pokemon, special marks will appear in the upper
right-hand corner of the screan. A bronze trophy means you've caught
all of the availiable Pokemon through one of the following methods:
encountering them in the tall grass, surfing, fishing, or sneaking up
on hidden Pokemon. The more methods you complete, the better the
trophy becomes! A platinum trophy means you've caught all the Pokemon
possible for that area!"