Resistance for spread damage & bench.

[algernon]

Specifically:

Bronzong's Cursed Alloy and Pain Amplifier:

Does resistance reduce/stop damage via Cursed Alloy?

Does Pain amplifier damage resistant pokemon on bench?

in general:

Does weakness and resistance come into play for bench pokemon unless attack specifically states "do not apply weak/resis"?

 

[PokePop]

Both Cursed Alloy and Pain Amplifier "place damage counters".
That is not the same as doing damage and so neither are affected by Weakness or Resistance.

Aside from that, W&R never apply to the bench.