At least Bouldy isn’t mouldy.
While looking for something important hidden in a cave inInfinity Nikki, Nikki and Momo have a rocky encounter.
The weakspot itself will only appear after Bouldy has sent out an attack strong enough to wear them down.
Luckily, Bouldy’s attacks are quite easy to anticipate and dodge.
Bouldy will use them like bowling balls - don’t get knocked down and you’ll be fine.
This is showing you where they’ll land after they jump.
check that you’re not standing in or near this circle and you won’t be crushed.