People are saying Dynamax might only be available during Gym battles and Raid Battles. Bevause there is a section where they said the Staidum is built for the pokemons to turn big.
I hope it is true because that would be crazy using it in the wild.
If it is out of the competitive game and normal gameplay it's something.
But they already said you'll need to do raid battles to capture some pokemon...
The disco ball pokeball to use on them was cool, at least.