Does Dark Moon struggles with his gem after these years with it even after reconnecting with Luigi?
He doesn't really struggle with it nowadays, he's gotten a good grip on the gems power so he's been pretty good with it for a while.
Especially with Luigi's help stopping all the things that made them get the gem in the first place (my headcanon) -> The Boo's and Ghost's being captured and locked away by E.Gadd, and just attacked in general by others. Without all the anger from that fueling the gem it's been a cakewalk.
They only really struggled with it when they first got a hold of it and it started affecting them fully, had a really hard time controlling themself and their anger. Lashing out on everyone and becoming colder. It only became worse as time went on throughout the 3 Luigi's Mansion games.
The only way he'd struggle with it now is if he takes it off for a while, it gives him nasty power withdrawals. He's way too used to all the power the crown gives off so he's kindof stuck with it forever without it hurting him, so good thing Luigi and his brothers can help him out with it :3.
I've drawn a little thing about this before, here
I seriously wanna go back to that concept >:3 I don't really see people exploring that much...


















