Can you check if you talked to the Golem after defeating the Mega-Charizard-X boss in the mountain maze and can you check if you interacted with the rock in the back-room of the underwater area?
Also you should be able to go back to the forest master by interacting with the treestump with mushrooms on it.
Stockpile isnt coded correctly and also banned in PvP because of that.
Swallow isnt coded yet.
https://pokemonrevolution.net/forum/topic/28126-list-of-broken-moves-abilities-in-pro/
Thats not a bug but actually an intended mechanic, you can read a detailed explanation here for example:
https://pokemonrevolution.net/forum/topic/198189-bug-in-climates/?do=findComment&comment=1133075
Love Island is an island of love and friendship as the name indicates. You need a pokemon that loves you to break these special rocks.
At least thats the explanation I like to go with.