>>21361091Beedrill can't even afford to run Substitute unless it's a sweeper set, which you won't see being used outside of elo hell because of how unreliable it is. Also
>M-Beedrill>doing jack shit to M-MawileImmune to one of its STAB and double resist against the other, while the only coverage move it can run for it is Drill Run which doesn't deal that much anyway since M-Mawile is surprisingly bulky. Also Intimidate which would force it into U-Turn.
The only Pokemon that walls M-Beedrill as hard as M-Mawile is Aegislash and Talonflame.