The First Great PC War is an event that took place over the course of Day 7 during the Pokemon Emerald run.
The Hivemind decided to use the PC to add Pokemon to the party. However in the chaos, the entire party was deposited in favor of leveling SS .F as its only party member. Many viewers decided to continue the run using only the under leveled Tentacool forcing a conflict between those who wanted to retrieve their previous party, and those who wanted to just use SS .F in order to avoid the PC.
Over the course of the day, A continuously went back and forth from the PC, trying to fix her party and resulting in the accidental release of Dottie & A's original Oddish. Eventually they managed to withdraw M4.