no it will not let you
yes, once you leave the dungeon it gets revived and healed
Once you get to Easterly Town talk to Munna.
You get cresselia eventually once you beat all the treetops.
Actually that only works on regular pokemon if the boss pad is shiny its a legendary you automatically get it once you beat it a regular boss you get lucky
Yes, you can duplicate Pokemon on Emerald more than once.
Once you obtain the Sapphire in Dotted Hole a scientist will take it from you then tell you the 2nd password for the Rocket Warehous which is Yes nah Chansey.
Not In your party at once
When you change your password, it will ask you to confirm your password, if you do it two times you are more likely to remember it than just entering it once.
You release:Gengar, Dragonite, Garchomp, Spiritomb, Dusknoir all at once to get a giratina ticket then go to the recruitment house and select recruit using ticket.
You type in the password more than once
Undertaker has Won The Royal Rumble Once in 2007
You have to release:Dragonite, Bastiodon, Lucario, Garchomp, Magnezone all at once then a dialga ticket should come out then go to the recruitment house and select recruit using ticket and now you have dialga.