A dusk ball can be sometimes received by cheating BUT, try Pastoria City, got the PokeMart and talk to one of the shop keepers, they should have it.
Dusk Ball
Location: Pastoria City PokeMart.
Used for: Useful for dark places like caves on dungeons, also at night.
Extra Tip: Dusk Ball is 2x sometimes better than Ultra Ball.
Master Ball! but if you dont have it, just use dusk ball at nite.
NO! I recommend a dusk ball!
I find dusk balls much more helpful.
No, there is no such thing as A dark ball, But there are Dusk balls.
No way you can make a dusk ball act like a master ball unless you do a hack which is bad idea.
Use a dusk ball.
pokemart
No cuz there is dusk ball too.
I would use a dusk ball.
That was a Dark Ball.
there is no dark ball but you could get a dusk ball and any other poke ball
Buy it at the poKemon league