Definitely won't be CIB, 99.9% odds that will be cart-only everywhere you manage to find it. Still, just the cart is going for over $20 online.
And I was wrong, it wasn't Master of the Monster's Lair I picked up today, it was Deep Labyrinth. I had left it in the car & was going by memory & what the MotML cart looked like. Atlus game all the same.
IIRC, Deep Labyrinth is not a game that you'd be wanting to play in public - as, I *think* that it's one of "those" DS games that has you either yelling in and/or blowing in the mic a lot
Anyone play/know anything about Infinite Space for the DS?
I put MWMW in the same charmingly fun, eccentric, & whimsical category as something like a Mr Mosquito.