Talk:Power Up/@comment-37818842-20181215013252

I've searched and can't find an answer anywhere. Hoping you can help. My Slaking appears to have lost over 100 CP since I evloved it about 6 months ago. Any idea why? Does this mean all my Pokemon are losing CP? The screencapture of the 4005 CP is from the day I evloved it in May and the 3901 CP was screencaptured today.