MapleStory/Monsters

There are many monsters in the world of MapleStory. The most dangerous monsters live deep in dungeons. Harmless monsters tend to stay by towns. Maple Island is one of the places that has very few monsters and are mostly very weak. Higher level monsters live in Victoria Island, but more dangerous monsters live closer to the center (Dungeon) of the island. Ossyria mainly has high level monsters as well as three major bosses.

There is also a complete list of monsters and bosses.

Items, leftovers, and Mesos
After killing a monster, Mesos or monster leftovers (ETC. items) may be dropped sometimes. However, the monster may also drop something rare (infrequently of course), such as an equipment, which can be worth a lot. The mesos dropped by a monster is varied, and the range varies with the monster (and is usually, but not always, somewhat proportional to the level of the monster, so you will find that in SOME circumstances monsters of same level drops the same range of mesos), the maximum value usually being 1.5x the minimum value.

MapleSEA
MapleSEA released all Guild Quest, Perion Excavation Site, and Pine Forest monsters.
 * Monsters Release Date: April 11, 2007
 * MapleSEA Version 0.41
 * Guild Quest/Excavation Site
 * Pine Forest Buddha Shrine (Zipangu)

KoreaMS

 * Monsters Release Date: April 07, 2007 (GMT+8)
 * KoreaMS Tespia Version 1.2.80

EuropeMS

 * Monsters Release Date: April 05, 2007 (GMT+2)
 * EuropeMS Version 0.22

TaiwanMS
TaiwanMS has released all Thai Floating Market-related maps and monsters.
 * Monsters Release Date: March 28, 2007
 * TaiwanMS version 0.47

GlobalMS
Orbis Party Quest and Easter Event monsters are now available in GlobalMS. Found at the end of the third party quest located in Orbis.
 * Monsters Release Date March 27, 2007
 * GlobalMS Version 0.36
 * Easter Event
 * Orbis PQ
 * Summons

JapanMS
JapanMS has released all Fourth Job related information, and Monster rider information.
 * Monsters Release Date: March 28, 2007
 * JapanMS Version 1.25

ThailandMS
ThailandMS received Orbis PQ, Sharenian Guild Quest, and Maple Home Delivery Service.
 * Monsters Release Date: April 18, 2007 (Preview)
 * ThailandMS Version 0.30

Found at the end of the third party quest located in Orbis. Sharenian Guild Quest, Perion Excavation Site and Perion Ruins are now available in ThailandMS.
 * Orbis PQ
 * Summons
 * Sharenian Guild Quest

ChinaMS
ChinaMS has released all Fourth Job related information.
 * Monsters Release Date: April 2007 (Preview)
 * ChinaMS version 0.51?