I believe so, lemme just adjust the count to 9 because you start counting down on post 151. Just make sure to alter his HP every post so it goes down by 1. You can also hurt him x2 while that's happening.
Chiaki Nanami: 23
GLaDOS: 22
Kirby: 21
Lucario: 21
Meta Knight: 21
Miles "Tails" Prower
Princess Luna: 25
Toadette: 18
Toph: 18*9
Wheatley: 20
Post count: 151