Castlevania Harmony of Despair [NPUB30505]

that's an exemple that they are not necessarly the dlc char that cause the bug, but the way they are selected

ungenesis said he can use all the char, i'd like to know how he manage this

Where did he mention he can use all char?

I can use all DLC chapters and the players I tried so far are Fuma,Yoko, Maria, Richter, Simon & Julius and they all work.
The main problem is that you cannot have all the DLC characters in the same folder. You can only have 3 DLC characters in the folder, but you can swap them at any time. I just picked my favorite 3 and that's it.
I should also mention that Richter & Julius are highly incompatible, so you cannot have them both at the same time.

I tried using the workaround you mentioned, but only Yoko and Julius seem to work, I used the exact same build (v0.0.5-7321) and used the USA version so I don't know how we got different results. I followed the 3 character limit you mentioned and put the others in another folder so how did you get all of the DLC characters to work like that?