Usagi
Dr. Robotnik's Mean (Toe)Bean Machine
While I do not know of any specific list of items that are "hidden/secret", there are a few notable places where you can get items that otherwise don't drop in game; those places are Claire's Deal 5, Gallon's Shop, Black Paper's Deal 2, To The Deepest Blue -MA4 Venue- and Challenge Mode. Challenge Mode being special and not strictly a quest like the others, it is a series of quests/areas that is done as a group only and if the challenge is met pays out some must have items known informally as S Ranks.@Usagi
Wow! Thank you very much for the detailed explanation and the character guide! I didn't know that a guide exists for PSO BB.
Reading through your list it seems like that I already have most the basic equipment. But I think that I should get a v502, the Ranger Wall and a Hell Raygun next!
Is there a list of hidden/secret items list for PSO BB somewhere? I'd consider the Ranger Wall as one of these items. Never heard anything about the Ranger Wall before!
Thank you so much for your stunning answer!
Once you have the photon drops, these S Ranks are where I would look towards to step up your gear to the next level since you can add specials to them that have no reductions, making them good at targeting multiple times with Hell or Demon's.
As for Ranger Wall, as stated on the Wiki it can be found in the Gallon's Shop quest. All it takes is a little time, a little meseta and a lot of button-mashing; just load up the quest; go to the second door on the left (assuming youre walking from quest counter, its right before the item shop on the same side), talk to the lady and warp, play the top left console's game "button-mashing" until you get 300 and then talk to the guy in the same room and the option to get a Wall for the character class you are on.
It is worth noting the option for the Wall will not appear with under 300 points accumulated and you can only get 1 Wall per character and it is class specific, so do these step only on your RAnger as Ranger Wall is generally considered the only useful one of the three.