Preloading the games do not cause leaks. It is impossible to crake a preload mostly because there isn’t fully on the system until release day. The game will need a physical copy to actually leakA new rumor, another calling Grookey Grass/Normal and 75 new Pokémon.
And this is not a rumor, but it says games could leak soon since downloadable copies are coming out soon.
I couldn’t find a place for the second one since I knew it wouldn’t be good in General.