How do you catch every Pokemon in firered?

Answer 1

Here are opinions and answers from Pokemon playin' FAQ Farmers: * To get all Pokemon, trade and catch or what I reconmend is Action Replay. You can get one at Target, Wal-Mart, EB Games or GameStop. * To get every Pokemon, you have to trade, catch and collect games like Ruby, Sapphire, Emerald, Leaf Green and FireRed.
Inside the Power Plant.

Answer 2

You cant without trading or using action replay

all you have to do is catch evolve, and trade with your friends

Gotta Catch Them All!

hard work, an exp share, leafgreen, and a brother who is starting a new game in Pokemon emerald!!! at least that's how i did it (well i only have 60 Pokemon left to capture) I used an exp share to raise weak Pokemon up to evolve them. i got most of my Hoenn Pokemon from my bro, who was really far in his emerald (like all 3 regis, Raquaza, Groudon, Kyogre). there r some Pokemon that u cant get in FR and u can only get in LG.

You have to trade with other Pokemon games, go to Nintendo Events, or use cheats with a cheating device.

You mean lugia well you have to get the purified lugia from Pokemon xd gale of darkness.