BW2 - Changing Single Battles to Doubles help

[Skitterfact]

OK, so, I decided to make a quick hack of White 2 where I made all the trainer battles doubles. I do have substantial experience with rom hacking, but predominantly GBA and 3DS - my DS experience is fairly basic. So I changed the majority of single battles in the game to doubles, adding new Pokemon when necessary. However, ingame, when a trainer sees me, while they'll walk over to me, no text will appear, and the game will be unable to progress, though music plays. If I talk to a trainer, the text box will flash white for a split second, but the battle will launch and be a double battle. Plot-important trainers like Hugh seem to have no issue. Does anyone have any idea what in particular causes this issue and how it can be fixed?