The randomizer uses the player name as the seed it seems! Same name same seed!

The AI on hard mode is scaled according to like the average level of your party, not the PC. If you have a lvl 5 pkmn at the water gym, the game with use a minimum enemy trainer level from the base game. Wild pokemon are not affected by this scaling

Safari zone seems to actually give 2 minimum perf IVs.

Some added abilities like telepath don’t work at all.