EDIT: I have added some very rough refs that you might find useful at the bottom. I apologize for the lack of quality. I am a bit busy with exams at the moment, so my drawing time is cut short, and Sundance is already busy with so much other stuff for the group.
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I will remove this journal later, but I'm adding it for the time being so I can clear up some confusion.
NOT HAVING THE STATS TO COMPLETE THE -BONUS- PART OF A MISSION DOESN'T MEAN YOU CAN'T DO A MISSION.
As an example, you need a STRENGTH stat of 4 or more to perform the double takedown with Luke. Note, this doesn't mean that pokemon below a strength of 4 can't join