I already posted once here and I don’t wanna spam so this is just gonna be something small Mega Marrowack only gain 75 base stats when it mega evolves, so all I’m suggesting is that those 25 be put into its special defense, since it’s HP is already so low.
Also give it access to zombie strike if it doesn’t already
it will be able to learn Zombie Strike once the TM is available in game
Good because it can’t learn a single ghost move in the battle sim