Pokemon that counter Musharna:
Attackers:
Butterfree (Bug Buzz), Drifblim (Shadow Ball), Parasect (X-Scissor), Mightyena (Crunch), Mothim (Bug Buzz), Shedinja (X-Scissor), Vespiquen (Attack Order)
Walls:
Beheeyem (Bug Buzz), Girafarig (Hyper Voice), Grumpig (Energy Ball), Lunatone (HP Rock)...