There are three different levels in Mt. Moon, populated by four types of Pokémon and multiple trainers. Also along the way, you'll notice that the criminal gang Team Rocket is carrying out an operation in Mt. Moon, and it's up to you to blow their operation wide open!
There's a Rare Candy within Mt. Moon, but save it for now. Your Pokemon level up too fast right now to justify using a Rare Candy. In addition, Mt. Moon is where you will find your first Evolutionary Stones. The Moon Stones you find here can be used to evolve Nidorino, Nidorina, Jigglypuff, or Clefairy. If you wish to use it on Nidorino/a, you should wait to do so at Level 22, and only at 22, to gain access to great moves for both.
If you dont want to fight all the trainers and just reach the end of M. Moon then go down the very last ladder on the first floor and follow the path from there. Each floor section will have a detailed guide to get to each trainer/item.
1F
From the entrance you should go left grab TM09 then continue left to face Bug Catcher Kent. To the left of Bug Catcher Kent is a paralyze heal.
Head back east and face Lass Iris. Continue east and follow the path until reach the first ladder. Dont go down it yet and head south. You will then find Super Nerd Jovan. Just northwest if Jovan is a potion. Go to the south wall and follow it to find a rare candy. To the northwest of the rare candy is Bug Catcher Robby. Go back to the south wall until you hit the corner and go north to find an escape rope. Keep going north until the wall to your left ends then turn left to get to the ladder that we skipped before and go down it to get to B1F
Items
- TM09 Bullet Seed
- Parlyz Heal
- Potion
- Rare Candy
- Escape Rope
- Moonstone
Pokémon found
| FireRed and LeafGreen | |||
|---|---|---|---|
| Pokémon | Level | Rate | |
|
Zubat | 7-10 | 69% |
|
Geodude | 7-9 | 25% |
|
Paras | 8 | 5% |
|
Clefairy | 8 | 1% |
Trainers
| FireRed and LeafGreen | |
|---|---|
| Trainer | Pokemon |
 Bug Catcher Kent Reward:  132 |
|
 Lass Iris Reward: 224 |
|
 Super Nerd Jovan Reward: 264 |
|
Bug Catcher Robby Reward: 120 |
|
Lass Miriam Reward: 176 |
|
 Youngster Josh Reward: 160 |
|
 Hiker Marcos Reward: 360 |
|
B1F
First ladder
Items
- TinyMushroom ×3 (hidden in the rocks in the tunnels, but only later on in the game and subject to an uncertain bug where they might not be encountered; respawn occasionally)
- Big Mushroom ×3 (hidden in the rocks in the tunnels, but only later on in the game and subject to an uncertain bug where they might not be encountered; respawn occasionally)
Pokémon found
| FireRed | Level | Encounter Rate | LeafGreen | Level | Encounter Rate |
|---|---|---|---|---|---|
 Paras
|
5-10 | 100% | Paras
|
5-10 | 100% |
Floor B2
Items
- Star Piece (BF2: 1st ladder)
- Ether (BF2: 2nd ladder - hidden in the lone rock)
- TM46 Thief (BF2)
- Moonstone (BF2: hidden in rock before you choose a fossil)
- Revive (BF2: last ladder)
- Helix Fossil (BF2, can choose only 1 fossil), can be resurrected into Omanyte.
- Dome Fossil (BF2, can choose only 1 fossil), can be resurrected into Kabuto
- Antidote (BF2)
Pokémon found
| FireRed | Level | Encounter Rate | LeafGreen | Level | Encounter Rate |
|---|---|---|---|---|---|
 Zubat
|
8-11 | 49% | Zubat
|
8-11 | 49% |
 Geodude
|
9-10 | 30% | Geodude
|
9-10 | 30% |
| Paras
|
10-12 | 15% | Paras
|
10-12 | 15% |
 Clefairy
|
10-12 | 6% | Clefairy
|
10-12 | 6% |
Trainers
| FireRed and LeafGreen | |
|---|---|
| Trainer | Pokemon |
| File:Pokemon FRLG Team Rocket Grunt M.png Team Rocket Grunt Reward: 352 |
|
| File:Pokemon FRLG Team Rocket Grunt M.png Team Rocket Grunt Reward: 352 |
|
| File:Pokemon FRLG Team Rocket Grunt M.png Team Rocket Grunt Reward: 416 |
|
| File:Pokemon FRLG Team Rocket Grunt M.png Team Rocket Grunt Reward: 416 |
|
Super Nerd Miguel Reward: 288 |
|
New Pokémon
The most common Pokémon among caves in all the Pokémon Core games. At this part of the game you can only evolve it into Golbat. In order to evolve it further into Crobat, you will need to beat the Elite Four and to raise Golbat's happiness to the maximum. Crobat, however, is an excellent Pokémon which has decent Attack and magnificent Speed. You can catch Zubat later because Golbat doesn't do very well on the Elite Four.
The first Rock-type Pokémon in this game. It has powerful attacks early on and is easy to train. However, it can't stand Water- nor Grass-type attacks so be cautious when using it. It evolves into Graveler by leveling up and then into Golem by trading. Golem, however, is inferior to Rhydon (which is also a Rock/Ground-type Pokémon) statwise and Rhydon can be obtained easier since Rhyhorn doesn't need to be traded to evolve.
A weak Bug/Grass-type Pokémon which can be easily found in Basement Floor 1. It evolves into Parasect. It has numerous weaknesses and its stats are quite poor (especially Speed), so using it isn't recommendable.
A caught Paras has a chance of holding a Tiny Mushroom or a Big Mushroom. These items, worthless now, have a purpose much later in the game, serving as a currency for an unique Move Tutor that can reteach a Pokemon its early moves.
It evolves into Clefable by using the Moon Stone. Clefable may be worth a second look as it is capable of learning the wonderful move Soft-Boiled from a Move Tutor, a feat otherwise only available to Chansey.