LogFAQs > #954883251

Mensis posted...

you get that ability past mid game. If you have a key open the hatch to the sewers and progress through there.

I've definitely been through the sewers so I guess I must've missed. I've already gotten two of the three black egg masks, and other abilities like the super dash and double jump and ground smash, so I thought my progress would've ended a lot longer ago if I was already supposed to get this black wall ability.

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Forever Momo;