Some of the monsters in MapleStory2 include:

1)Mushroom and Panlid Official MapleStory2 Teaser
Monster, Panlid, Snail, Teaser

2) Sleep Official MapleStory2 Teaser #2

3)Blue Slime and King Slime

4)Bird Monster and Worm – Official Teaser Desperado, Monster, Teaser

5)Desperado – Official MapleStory2 Teaser Bird, Monster, Teaser, Worm

6)Drill Monster – Official MapleStory2 Teaser Monster, Teaser