Detective Conan 25th Anniversary (Turbo Engine Skateboard) Playing Cards, TCC x Gosho Aoyama 2021, official merchandise, limited edition of 4869 for true fans. Apoptoxin. APTX 4869 is a pun on Sherlock Holmes. 4869 can also be pronounced Shi-Ya-Ro-Ku (シャロク Sharoku), which translates into Sherlock. Adding to the pun, the password for the APTX data is Shellingford, an unintentional misspelling of Sherrinford, which was the name Arthur Conan Doyle called his detective character before deciding on Sherlock. The password and the pun name seem to be related to why several members of the Black Organization call APTX 4869 the incomplete detective, implying APTX 4869 is not finished yet.