some ether, awakening, maybe a super potion
no
yes use trick to swap the his item with yours
You need to get the Silph Scope.
you can't delet key items in any Pokemon games.
Northern part of Seven Island
Simple. There is no Lost Tower in Fire Red. However, it does exist in Diamond, Pearl, and Platinum. If you're reffering to the tower with ghost pokemon in Fire Red and Leaf Green, then it is in Lavender Town.
Get the Silph Scope and go back to Lavender Tower. You'll be able to see the ghosts.
Use the itemfinder then press A.
By defeating team rocket in saffron tower
i want a vulpix in fire red but from things i've looked at there is no vulpix in fire red just leaf green : ( sorry
Key items are impossible to trade or remove, except to Pokémon Colosseum.
You can get Gastly only by trading from Fire Red/Leaf Green it's in Lavender tower.