in some dungeons there will be doors you use the key on the doors while facing them
Use water types and have reviver seeds with you
yes
You could get a Rom for one of the Pokemon mystery dungeon games and then use visual boy advance to play it.
Become a goast pokemon, use a mobile orb or get the IQ skill super mobile. You can also use a mobile scarf.
no need for cheat,just use golden mask for this
You can't.
You have to be defeated in a dungeon.
Either use a key in solar cave or when lombre speaks of stormy sea, speak to whishcash
You use it to get to Jirachi.
FTW
all water Pokemon at least
try to use a grass type
Use an action Replay or search it in google
Use action replay
l+A
Use a Key on 27F in Northwind Fields and get the Water Stone.
you can teach it to your Pokemon if it can learn it or you can sell it