Alright, here it is:
>There are secret trainer fights that are references to Martial Arts movie actors (Bruce Lee, Jackie Chan and so on). They're placed in the most hidden parts of the island. Defeating each of them grants you the ability to Gigantamax your Starter Pokémon.
>You'll be able to enter one of the two towers with only your Kubfu. Your bag will also stay behind. You'll be able to pick up items and catch pokémon while climbing the tower tho, like a Rouge-Like.
>Mustard is the "main story" final boss, he uses in his team the Urshifu form of the tower opposite
to the one you choose.
>The two new rivals will be your allies in climbing the towers: you can either let them be controlled by AI or give a joycon to a friend to control it (like in the Let's Go Pikachu/Eevee)
>After beating the first tower and defeating Mustard, you'll get to climb the second one, which is like an Hard Mode: you'll enter with your Urshifu, fighting stronger trainers and finding rare items that you can keep after beating the Tower. The new items introduced in the DLC can be found here.
