Pokemon FireRed Cheat: Mystery Gift
In any Pokemon Center, go to the clipboard by the shop owner and enter “Link Together With All.” You will now have access to the mystery gift system.
Pokemon FireRed Unlockable: Diploma
Fill National Dex completely.
Pokemon FireRed Unlock Enable trading to Ruby and Sapphire
Go fix the Network Machine on Island 1. This is done by getting both the Sapphire and Ruby (in game items) and bringing them to the machine.
Pokemon FireRed Hint: Version Exclusive Pokemon
These Pokemon can NOT be found in Fire Red and have to be traded from Leaf Green/Ruby/Sapphire/Colosseum:
* Sandshrew
* Sandslash Vulpix
* Ninetales
* BellSprout
* WeepingBell
* Victreebell
* Slowpoke
* Slowbro
* Slowking
* Staryu
* Starmie
* Magmar
* Magby
* Pinsir
* Azurill
* Marill
* Azumarill
* Mistreavious
* Sneasel
* Remoraid
* Octillery
* Mantine