leaf walllop?

[Gaelen1227]

Virizon from Noble Victory set leaf wallop attack states "During your next turn this Pokemon's Leaf Wallop attack does 40 more damage (before applying weakness and resistance)." My question is will the bonus stack to 80 120 160 200 240 280 320 360 400 Etc.? thanks ahead of time.

 

[PokePop]

Each effect lasts one turn. So there is nothing there to stack.
You would do 40, 80, 80, 80, etc.