Then you come across a clearing with the yellow pokemon in the middle. It's slowly rotating around, as if looking for some more pokemon to appear. At this point, you have not entered the clearing yet.
Suddenly, half a dozen monkey-like pokemon jump out from the trees and surround the yellow one! The yellow pokemon, already crouched at the ready, discharges a huge blast of electricity into its ambushers. Two of them immediately fall over, two cringe and appear unable to move, and the other two are still standing.
(M3 & M2 are the two that are paralyzed.)