You must find the two gems and give them to Celio. The Ruby is found on One Island in Mt. Ember. For the Sapphire you must go to the Dotted Hole on Six Island and find it, but it will be stolen and you have to go to the Rocket Warehouse on Five Island and retrieve it.
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i think you can get timer balls on two island after you Complete Celio's Network Machine
you have to suck his weiner
You have to beat the elite fours,your rival,(note:you must have the national dex for this part)get the ruby from island one to the network machine(also on island one)and the sapphire from island six into the network machine also(ironic because these games came out a year or so after Pokemon ruby and sapphire versions).
In Pokémon Fire Red, catch all 386 Pokémon to get the diploma. On Island 1, fix the network machine by bringing ruby and sapphire to the machine. This will unlock ruby and sapphire trading.
After fixing the Network Machine on One Island, you can trade a Mudkip from Pokemon Ruby or Sapphire. You can't catch a Mudkip in Pokemon FireRed.