This is a difficult question and really depends on you and your illness. Although Cancer treatment of America does use this is their tag line I would suggest talking to your physician about this.
the best gba game is oviously Pokemon emerald
you can only migrate it from the GBA game Pokemon emerald.
Electivire is a 4th generation Pokemon meaning it was created after the GBA Pokemon games so that means its not obtainable in any GBA game including emerald.
There is no way to trade between Emerald and Diamond, because they are for different systems. The closest thing is that if your friend has beaten the game then you can put your Emerald into his DS and put your Pokemon into his game. The only problem is that you can't trade Pokemon from Diamond to Emerald, only Emerald to Diamond. however there is a way to get the Pokemon from a GBA cartridge to the DS cartridge. when you get in to the Pal Park supposedly if you have a GBA cartridge in the slot2 and a DS Pokemon game in slot1 the Pokemon from the GBA cartridge will "migrate" to the slot1 game.
Pokemon emerald because of the cloning glitch
It depends for which game man. [ GBA ] Pokemon Ruby [ GBA ] Pokemon Sapphire [ GBA ] Pokemon Emerald [ GBA ] Pokemon FireRed [ GBA ] Pokemon LeafGreen [ NDS ] Pokemon Diamond [ NDS ] Pokemon Pearl [ NDS ] Pokemon Platinum [ NDS ] Pokemon HeartGold [ NDS ]Pokemon SoulSilver. for which game man?
No you can't there is no way to transfer Pokemon from ds game to gba games only gba to ds
No, Leafeon an Glaceon DO NOT EXIST on GBA Pokemon games. No amount of cheating with AR/GS will get you these Pokemon on GBA.
You could migrate it from another GBA game, but otherwise it is impossible without the Emerald Cartridge.
get him on Pokemon ruby,Sapphire or emerald on gba and migrate him into platinum catch him in a gba Pokemon game and then go to pal park after the Pokemon league and migrate him to platnium
you cannot clone Pokemon in firered/leafgreen. the only gba game you can nlone in is emerald.
You have to have two Game Boy Advances to trade with emerald and ruby and a GBA to GBA link cable, another way to trade is if you use a GCN (gamecube) to GBA cable and you use Pokemon colosseum or Pokemon xd gale of darkness to trade emerald or ruby Pokemon to there then use colosseum or xd gale of darkness to trade your emerald or ruby Pokemon to the other game either ruby or emerald. Theres no way you can use a DS to trade with GBA games because the DS is not compatible with the GBA link cable.