Maple Story items shown on hidden street?

Some Maple Story items dont say how they are obtained or what MapleStory monsters drop it. so how are we supposed to obtain these items??? like some chairs, they show the description but its
not dropped by any monster or is not available anywhere.
Keep in mind Hidden-Street is often wrong, considering many guides or pieces of information are very old.
You also got to note that HS doesn't tell if if the item comes from Gachapon or not. So most likely, the items that has no "dropped from" info, comes from Gachapon.
Or haven't come out on GMS yet...or even are out, but no one has yet figured out how to obtain them and told HS so they could update the database? we'll Gms does have the data for the item's but it's not officially out yet.
You'll find pirate and timeless weapons there, but you can't obtain them yet.you can even owl or mts search for them. you actually can. just type "?" and a whole bunch of untranslated weapons(named "??? ?? ?" usually, lol) will come up in MTS/owl.
Maple Story Mesos