Since I was the last one left, I tried to defeat the two champions against me, but I died because of Teemo's mushrooms (i.e. his ultimate ability). If it weren't for Teemo, I could easily defeat the people in front of me.
Teemo can easily turn the tide in battles, if he place his mushrooms in the right places. I rarely played with Teemo so far. Probably I will play a few matches with him in the near future in the mobile version of the game (League of Legends: Wild Rift).
Good luck and have fun.
I play Teemo often. And when I put the mushrooms in the right place, I can get kills even when they are dead. This is really good.
Thanks. :D