In MapleStory, there are monsters called Mount that can be ridden. A Mount can be obtained through Gachapon or special events. The following Mounts can be obtained through a quest for the specific Classes/Jobs.
Aran
2nd Job (Level 50)
3rd Job (Level 100)
4th Job (Level 150)
4th Job (Level 200)
Cygnus
2nd Job (Level 50)
3rd Job (Level 100)
4th Job (Level 120)
Evan
2nd Job (Level 50)
3rd Job (Level 80)
4th Job (Level 120)
**NOTE: Mounts cannot be used inside of Party Quests and some maps.