From StrategyWiki, the free strategy guide and walkthrough wiki

Event dungeons are dungeons that are special, and can only be entered via Wonder Mail. The following Pokémon are Pokémon you can only get through Events.

• Ekans
• Arbok
• Diglett
• Dugtrio
• Gastly
• Haunter
• Gengar
• Ditto
• Articuno
• Mew
• Treecko (if not chosen as starter or partner)
• Grovyle (if Treecko was not starter or partner)
• Sceptile (if Treecko was not starter or partner)
• Groudon
• Kyogre
• Rayquaza
• Giratina
• Heatran

Also, most of these dungeons, like Mystic Forest, have Pokémon that appear on random floors.

Contents 1 Maze Cave 2 Mt. Avalanche 3 Giant Volcano 4 Mystery Jungle 5 Bottomless Sea 6 Shimmer Desert 7 World Abyss

[edit] Maze Cave

• Boss: Gabite
• Floors: 10
• Notes: Cannot recruit Gabite
• Objective: Save Shinx' sister with a Gabite's Scale.

This dungeon can be entered before going to Mystic Forest. The Pokémon are not too hard; they're about as strong as Pokémon on Mt. Spike. Just keep going until you reach Gabite.

• Gabite
• HP: 300+
• Ground/ Dragon
• Average Damage: 10+

By comparison, Gabite is stronger than Drowzee, but by this time, you should be strong enough to defeat him. Just keep pounding him with good attacks, and he should go down like a lead balloon.

Wonder Mail Password

78SR -H2M P0+4
Y6FY 1&Y+ #R96

[edit] Mt. Avalanche

• Boss: Articuno
• Floors: 19 + Peak
• Reward: Icy Flute
• Notes: After defeating Articuno, you are rewarded with an Icy Flute.

Wonder Mail Password

4MP= K98# CT%Y
R@-- &P7% %K86

[edit] Giant Volcano

• Boss: Heatran
• Floors: 19
• Reward: Fiery Drum
• Notes: After beating Heatran, you are rewarded with a Fiery Drum.

Wonder Mail Password

FH0T HYNH R0QF
86N8 +SY@ &%YN

[edit] Mystery Jungle

• Boss: Mew
• Floors: 29 + Interior
• Reward: Grass Cornet
• Notes: Only place to recruit Treecko, Grovyle, and Sceptile; get Grass Cornet at the end
• Objective: Just get to the end

Wonder Mail Password

X%8S WYY+ S-JF
PFH@ @##K 5W8K

[edit] Bottomless Sea

• Boss: Kyogre
• Floors: 49 + Bottom
• Reward: Aqua-Monica
• Notes: Get Aqua-Monica as an item at the end.
• Objective: Just get to the end

Wonder Mail Password

FN01 HWN- 00%F
8678 +XY@ &%#3

[edit] Shimmer Desert

• Boss: Groudon
• Floors: 10
• Reward: Terra Cymbal
• Notes: The shortest event dungeon. If you find it hard then just go and level up a bit then come back. Be sure to give Groudon a good battle for him to join you!

Wonder Mail Password

#&s6 ny2& yjn=
1p57 f0mn mh7y

[edit] World Abyss

• Boss: Giratina
• Floors: 30
• Reward: Rock Horn

Wonder Mail Password

JSN#- 0-0XRX+ SX55C

W1SS% P336&#S J0&-J