Many people want to see Marinette akumatized. There is a good reason why she never will. I have made a few requirements about how she can be akumatized as well as everything that will go wrong.
"Princess Justice, I give you the power to right the wrong that has been done to you and to bring justice." -Hawkmoth
1) If Marinette gets akumatized she will give her miraculous to Hawkmoth and Hawky will have won. Sorry Chat but you aren't Ladybug. (This was seen in Ladybug)
2) Evil Ladybug is going to (again sorry Chat) probably kick Chat Noir's butt. He is no match for her and neither is anyone else.
3) Hawkmoth will know Ladybug's secret identity. This means he'll be able to steal her miraculous while she's detransformed.
4) Now that she is a guardian Hawkmoth will have all the miraculous. That probably won't go very well.
In order for her to be successfully akumatized I have looked at Chat Blanc. This is the most likely to happen. Marinette will get akumatized and Bunnix will go back in time to grab past Ladybug. Ladybug goes back and erases that timeline so basically it never happened. Let's reel this back a little bit. Look at what Chat Noir did with infinite destruction. I really don't want to imagine someone under evil influence with infinite creation.
Thanks for reading! Stay peachy!
Bug Out!🐞
Image courtesy of Zagtoon