MapleStory/Mini Dungeons

Mini Dungeons are special, isolated zones with only one entrance. When you enter a Mini Dungeon, a two hour timer will appear at the top of the screen. If the timer runs out, you will be automatically placed outside of its entrance. If you re-enter a Mini Dungeon quickly enough, you can reach dropped items before they vanish, however some will disappear immediately. If you enter and exit Mini Dungeons rapidly, you may be subject to a short cooldown period (5 minutes at most) where you cannot enter a Mini Dungeon.

Under each Mini Dungeon section (below) you will find information about its location and the enemies that appear within.

Cave Where Mushrooms Grow

 * Zone name: "Mini Dungeon: Cave Where Mushrooms Grow" (referred to as "Mini Dungeon Cave of Mushrooms" when highlighting the portal from Dungeon: Ant Tunnel II).
 * Entrance location: "Dungeon: Ant Tunnel II". The portal is on the right side of the zone, near the bottom.
 * Enemies: Horny Mushrooms and Zombie Mushrooms.
 * Training tips: you can use the platform on the side of each floor, and the one where the exit portal is, to rest. If you're ranged, you can use these spots to snipe enemies. As Zombie Mushrooms spawn, they will slowly make their way to the bottom floor. After enough enemies are dead, the top floors will be empty while the bottom is overrun. If you're worried about taking damage, spend the entire time on the bottom floor so that enemies don't congregate in groups too large for you or your party to handle.

Henesys Pig Farm

 * Zone name: "Mini Dungeon: Henesys Pig Farm".
 * Entrance location: "Victoria Road: The Rain-Forest East of Henesys". The portal is on the right side of the zone, on a lone platform at the top of the screen.
 * Enemies: Pigs and Ribbon Pigs.
 * Training tips: the platforms in the center of the map can be used to rest, although there is a small chance that a pig may briefly hop across them. You can also use the platforms to snipe if you're ranged. Regular pigs tend to spawn exclusively in the upper left and right, and ribbon pigs are mixed in with regular pigs on all of the other platforms and ground floor.

Drake's Blue Cave

 * Zone name: "Mini Dungeon: Drake's Blue Cave ".
 * Entrance location: "Drake Collide".
 * Enemies: Dark Drake.

Holy Ground of Golems

 * Zone name: "Mini Dungeon: Holy Ground of Golems".
 * Entrance location: "Sleepy Dungeon IV".
 * Enemies: Stone Golem and Mix Golem.

Lair of Drumming Bunny

 * Zone name: "Mini Dungeon: Drummer Bunny's Lair"
 * Entrance location: "Eos Tower 76th floor ~ 90th floor", 14 levels up from the bottom of the screen (or 2 from the top).
 * Enemies: Drumming Bunny.

Kentaurus Round Table

 * Zone name: "Mini Dungeon: Kentaurus Round Table".
 * Entrance location: "Leafre: Battlefield of Fire and Water". The portal is on the right side down the map.
 * Enemies: Red Kentaurus, Blue Kentaurus and Black Kentaurus.

Resurrecting Memory

 * Zone name: "Mini Dungeon: Resurrecting Memory".
 * Entrance location: "The Dragon Nest Left Behind".
 * Enemies: Skelegon and Skelesaurus.

Newtie Protection Area

 * Zone name: "Mini Dungeon: Newtie Protection Area ".
 * Entrance location: "Destroyed Dragon Nest".
 * Enemies: Jr. Newtie and Transforming Jr. Newtie.

Red Nose Pirates' Hideout

 * Zone name: "Mini Dungeon: Red Nose Pirates' Hideout ".
 * Entrance location: "Red-Nose Pirate Den 3".
 * Enemies: Captain.

Hill of Sandstorms

 * Zone name: "Mini Dungeon: Hill of Sandstorms".
 * Entrance location: "Sunset Road: Sahel 2".
 * Enemies: Sand Rat.

Critical Error

 * Zone name: "Mini Dungeon: Critical Error".
 * Entrance location: "Alcadno Research Institute: Lab - Area C-1".
 * Enemies: Roid.

Remaining Memories of the Ship

 * Zone name: "Mini Dungeon: Remaining Memories of the Ship".
 * Entrance location: "Mysterious Path 3".
 * Enemies: Selkie Jr. and Slimy.

Longest Ride on ByeBye Station

 * Zone name: "Mini Dungeon: Longest Ride on ByeBye Station".
 * Entrance location: "Fantasy Theme Park 3".
 * Enemies: Froscola and Jester Scarlion.

Long Kiss Duku Good Night

 * Zone name: "Mini-Dungeon: Long Kiss Duku Good Night"
 * Entrance location: "The Destroyed Park II"
 * Enemies: Duku.

Sweet Cake Hill

 * Zone name: "Mini Dungeon: Sweet Cake Hill"
 * Entrance Location: "New Leaf City"
 * Enemies: ???

Sweet Cake Hill is only available during Global MapleStory's Anniversary Event, which takes place in May every year.