Always visit the left as that's where the last car is and the Maplestory Mesos explosions you have to escape from start on the right side. Stay on the top for so much as possible as there's less things to obstruct you and allow the explosions to catch up to you.When you need to head down, simply jump close to the border of the top of a vehicle and you should get within another one.Don't kill any of the critters, just repeatedly press on your potions and walk past them.Make sure you have your "Rewind" on in the event that you're large enough to possess it. If you make a mistake along with the explosions have been in view, utilize "Time Holding" and attempt to get as far ahead of these as you can.
Following the battle starts, strike her until she teleports. If she teleports, instantly press double up-arrow onto Maple story M Mesos among those (clear, no enemies on it) above platforms. That's when you know there's no longer any leaf bugs right down below. (The leaf bugs will kill you within one hit.) Jump down and continue attacking. Repeat this until she begins spawning her giant flame charm.
When she begins spawning her giant fire spell, immediately press "Time Holding" and press on twice up-arrow to get on top of a few of the high platforms, like before. Wait until it finishes, and jump back down. Duplicate the first four (4) measures until she's dead. I hope this is useful to anybody stuck on Shao. I could not locate some other guides about this.