I can't faceroll last challenge in the region?!! WTF devs, what's wrong with you. "E" in "E4" stands for "Easy" afterall!
1. Poke is faster because they are using items, like Choice Scarf
2. Use some pokemon that can setup, this AI is dumb enough to let you walk over it after that.
This is just an AI, with level disadvantage, you can beat it