Only with an action replay. There used to be an old way in the original games but they fixed this. Now there is no known way (so far) to copy items.
no there is not sorry
impossible...unless you can buy them again or catch the things? Actually you can copy items. But I only know that you CAN copy items and Pokemon in Pokemon emerald only. Sorry that is the only game i know that can do it. Heres how to do it, first go to the battle tower and give a Pokemon a item ( a Pokemon in the PC) or putting a Pokemon in a box. Log out of the PC and save. Then log back in and take the Pokemon or item and log out. Then go to the lady that does multi link battles( the one next to the PC. Tlak to her and register 2 Pokemon in any type of battle. She will ask you to save. Say yes. There will be a little wait. Then where it says "do you want to save" say no and turn off the power. Then turn the power back on. Then there will be a item in your bag or Pokemon in your party and a item or Pokemon in the PC!! Ideal for master balls for legendaries and Pokemon you like for you to trade for more Pokemon.
You have to migrate the pokemon so any pokemon you have in your leafgreen can be in pal park but it disappears from your leafgreen
The Tea item is exclusive to Pokémon FireRed and LeafGreen. It's not possible to obtain the Tea item in Pokémon Diamond or any version that is not FireRed or LeafGreen. The only way to have the Tea item in Pokémon Diamond is via a hack.
Not any hoenn Pokemon but firered and leafgreen can catch alot of kanto and johto Pokemon ruby and sapphire can and can't.
no
Any ghost type Pokemon can learn it.
of course
There are no cheats for ANY Pokemon games unless you have a gameshark
Any Pokemon game is fun and worth getting.
nothing use it as a Pokemon nothing to do with any events
Any pokemon from Sapphire, Ruby, and LeafGreen