The only reason why they go up against Pico even though Pico is already there is because Corrupt Pico is from the reimagined timeline before rewind starts (I also couldn't really change his vocals with the official flp).
Flp: https://www.youtube.com/watch?v=_3jGvECk0zY
blazingrose_: https://www.youtube.com/@blazingrose_5624
FCR Download: https://gamebanana.com/mods/357359