26 Unknown People

 are Does Bad Things Guy's murder victims. Some of them are re-used from puppets that have been in SML videos, for example, D-Money Junior. They were killed by Does Bad Things Guys because he wanted their souls all for himself. They are seen in The Secret Door, where they have no speaking roles, as if they were dead puppet victims.

Trivia
Many SML fans began to wonder what was actually behind the secret door and made video requests to the SML crew to know

Them puppets were some that Logan would of used in past videos

The blood was made out of play dough and two other ingredients

Jeffy revealed that why he screamed was because a man was dying but when Mario and Rosalina found Jeffy it was too late, he was dead

Some of the SML crew feared to go into the Secret Door

The room is now used for storing huge props