Much like humans and animals solid manifestations consist of flesh and bones or some other more physical substance. Because of this they can not go through walls or other obstacles without damaging them, unless they posses other supernatural abilities that makes this possible.
They can usually not be sucked into regular ghost traps, so the equipment must either be modified (as seen in The Boogieman is back) or other solutions to defeat them must be used, such as containing them in other ways ( as in The Boogieman Cometh) or completely destroying them (As done with Stay Puft in the first film)

Notable solid manifestations from the Ghostbusters universe Edit

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