So things like Amulet coin, luck incense, Pay Day, Happy Hour, etc. Do they all stack?
No money multiplier stacks with itself.
Happy hour stacks with amulet coin or luck incense.
Amulet coin and luck incense do not stack with each other.
Pay day and Gmax gold rush are money adders, not multipliers. Pay day is affected by happy hour, amulet coin, and luck incense.
Yes they all stack from a random wild battle you can get 800pokedollars much more from trainer battles
pay day users level x2 + Happy hour x2 total amount + Amulet coin/luck incence x2 total amount = money from battle
hope this helps! source experience and https://bulbapedia.bulbagarden.net/wiki/Pay_Day_(move) https://pokemondb.net/item/amulet-coin https://pokemondb.net/item/luck-incense https://pokemondb.net/move/happy-hour