To get the Amulet Coin in Pokémon FireRed, you need to visit Professor Oak’s Aide in the building on Route 16, just west of Celadon City, after you’ve registered at least 40 different Pokémon in your Pokédex.

Where to Get Amulet Coin in FireRed (Quick Scoop)

Step‑by‑step location guide

  1. Go to Celadon City.
  1. Exit the city to the west onto Route 16 and enter the gatehouse building there (the one that used to be blocked by a Snorlax if you haven’t cleared it yet).
  1. Inside the building, go upstairs to the second floor.
  1. Talk to Professor Oak’s Aide sitting at the table. If you have at least 40 different Pokémon registered in your Pokédex , he will give you the Amulet Coin as a reward.

If he doesn’t give it to you, it just means you haven’t hit 40 species yet—catch a few more and come back.

What the Amulet Coin does

  • When held by a Pokémon that participates in battle , the Amulet Coin doubles the prize money you receive from trainer battles.
  • There is effectively only one Amulet Coin in FireRed, so treat it as a key money‑making tool rather than something you toss or forget on a boxed Pokémon.

A popular strategy is to give the Amulet Coin to your lead Pokémon so it always activates in battles.

Mini “story” example

Imagine you’ve just cleared Celadon Gym and money’s tight for Full Heals and better Poké Balls. You check your Pokédex: 42 seen, 40 caught – perfect. You fly back to Celadon, walk west, climb the Route 16 gate stairs, and Professor Oak’s Aide hands over the shiny Amulet Coin as a thank‑you for your catching efforts. From then on, every trainer battle feels like a mini‑payday, and your late‑game grind for cash gets way easier.

Quick FAQ style notes

  • Do I need to beat the Elite Four first?
    No, you only need access to Celadon City and 40 Pokémon caught; it’s available mid‑game.
  • Can I get more than one Amulet Coin?
    No, FireRed only lets you obtain one through Oak’s Aide on Route 16.
  • Best time to grab it?
    As soon as you hit 40 species, ideally before heavy late‑game grinding so you maximize your money gain over the rest of the run.

SEO bits (for your post)

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TL;DR: In FireRed, get the Amulet Coin from Professor Oak’s Aide on the second floor of the Route 16 gate west of Celadon City, after registering 40 Pokémon in your Pokédex.

Information gathered from public forums or data available on the internet and portrayed here.