So I noticed the Aquatic Shell Marisas and Kotatsu Marisas don't move in the hiatus edition. In older and other editions, they were able to move around to do poo-poo, eat, etc.
I suppose this is in keeping with yukkuri canon about shelled Marisas being too heavy to hop along on their own?
That's my experience. They just sleep or bounce, and I have to keep them alive with juice. And they're almost always shitheads/super shitheads, so I amp them to adulthood and sell them.