what is the room on malfoy manor that transfor into anything

The room you’re probably thinking of is the Room of Requirement at Hogwarts, not Malfoy Manor. It can transform into whatever the person needs at that moment, which is why it’s also called the “Come and Go Room”.

At Malfoy Manor , the notable secret space is different: a hidden chamber under the drawing room floor, used to store Dark Arts items and later associated with prisoners during the war.

Quick distinction

• Room of Requirement : changes into almost anything needed.

• Malfoy Manor secret chamber : hidden storage/prison area under the drawing room.

The wording in your question most closely matches the Room of Requirement, since that is the room known for transforming itself into anything required.