>>51212984Yes, or at least, your Pokemon should gradually need less anyway - at least, beyond what energy you give them through affection. Like how new seeded soil tends to need more water at the beginning than once things start growing, just to develop the usual baseline saturation.
I don't interact much with Ghost-types, though, beyond an occasional friendly battle with a Trainer passing by, so don't take me as gospel on this. That said, craziness does seem to scale with the more Ghost Pokemon a Trainer has. Dunno which way that causation goes, if it even is, but I'd be a little wary, especially if you get more of the spectral kind.