Also had problems where I would set my thing's to default and legendaryspawntick would be set at 3000, but when I made a new singleplayer world it would set it to 25000, which one of these is correct?

Was just a little confused by a lack of info, im guessing all runs have to be run on default settings right? Is keepinventory allowed, and do we need to set the difficulty to peaceful? Is there a specific version of Pixelmon we need to use, and im guessing this is a no brainer but pauses are allowed correct?