>>34695182Someone made the baffling decision that after beating Cyrus, it should be totally impossible to leave Spear Pillar without also fighting Dialga or Palkia. This means you can't leave to restock on Poké Balls, which in turn means that Dialga and Palkia had to compensate by being way easier to catch.
Somehow nobody realized it's actually more challenging to leave, come back with more Poké Balls and have an actual fight and only more frustrating to be stuck there with no choice and no chance to prepare... That's anyone's guess. It's especially weird that the REASON you can't leave isn't even justified in-world, but literally just "Professor Rowan and Dawn or Lucas decide not to let you leave for no reason."