If you destroy enough of the same monster, it's even possible for them to become your friend.
Types of MonstersEdit
In the Maple World, there are Normal Monsters and Boss Monsters that block your path to destroy the Black Mage. Normal Monsters respawn quickly and have less HP than the Boss Monsters which are generally tougher and have a set spawn timer.
Event Monsters spawn in a map specifically for them, found usually in your home. They only appear for a limited time, so it is best to fight them when you can!