Consider the following:
>Shedinja + Alolan Muk with Air Balloon
>Shedinja dies
>Power of Alchemy
>Muk now has Wonder Guard
>The only moves that can hit it are ground type
>Immune to ground because air balloon
>???
>Profit
>>30306209
>Salazzle used Toxic!
>>30306209
Power of Alchemy can't inherit Wonder Guard
*teleports behind you*
*pops balloon*
Heh...nothing but hot air.
>>30306209
GF actually considered that. PoA can't copy Wonder Guard.
>>30306209
whirlwind/roar