Mt. Chimney is a Volcano. Team Magma or Team Aqua can be found here (or both in Pokémon Emerald). Later on when Maxie/Archie is defeated, trainers enter this location waiting for challengers to challenge them to a battle.
Trainers
Ruby/Sapphire
Team Magma
| Trainer | Pokémon | Level |
|---|---|---|
 Team Magma Grunt |
 Zubat
|
20 |
 Poochyena
|
20 | |
Gain:  400
| ||
 Team Magma
| ||
|---|---|---|
 Tabitha | ||
 NumelLevel 20  
|
Poochyena Level 20 
|
Numel Level 20
|
| Gain: 800
| ||
| Team Magma
| ||
|---|---|---|
 Maxie | ||
 MightyenaLevel 24
|
 GolbatLevel 24  
|
 CameruptLevel 25
|
| Gain: 1280
| ||
Team Aqua
| Trainer | Pokémon | Level |
|---|---|---|
 Team Aqua Grunt |
Zubat
|
20 |
| Poochyena
|
20 | |
| Gain: 400
| ||
 Team Aqua
| ||
|---|---|---|
 Matt | ||
 CarvanhaLevel 20 
|
Poochyena Level 20
|
Carvanha Level 20
|
| Gain: 800
| ||
| Team Aqua
| ||
|---|---|---|
 Matt | ||
| Mightyena Level 24
|
Golbat Level 24
|
 SharpedoLevel 25
|
| Gain: 2000
| ||
After Team Magma/Aqua left
|
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Emerald
|
| ||||||||||||||||||
Double Battle:
| Trainer | Pokémon | Level |
|---|---|---|
 Team Magma Grunt & Team Magma Grunt |
Zubat
|
20 |
| Numel
|
20 | |
| Gain: 800
| ||
| Team Magma
| |||
|---|---|---|---|
Tabitha | |||
| Numel Level 18
|
Poochyena Level 20
|
Numel Level 22
|
Zubat Level 22
|
| Gain: 880
| |||
| Team Magma
| ||
|---|---|---|
Maxie | ||
| Mightyena Level 24
|
Zubat Level 24
|
Camerupt Level 25
|
| Gain: 2000
| ||
After Team Magma left
|
| |||||||||||||||||||||||||||||||||||||||||||||||
Double Battle:
| Trainer | Pokémon | Level |
|---|---|---|
 Beauty & Hiker Melissa & Sawyer |
 Marill
|
22 |
 Geodude
|
21 | |
| Gain: 2520
| ||
Template:Hoenn