Stuffed Rabbit Toy

 WARNING: This page contains spoilers for Repentance and The Bonus Mod 

Blow up the painting of Isaac in the hallway leading to Mom's room, doing this will open a door in the closet next to Isaac's room.

Inside the room there will be a Trapdoor that leads to The Closet, you will need to traverse back to Depths starting from the 1st floor (like doing the floors backwards to get to Home but this time going forward)

After beating Mom again instead of The Polaroid or The Negative spawning a Stuffed Rabbit Toy will spawn after taking this Isaac will be teleported back to his room in Home, walking over Isaac's carpet will place the Toy on the carpet, Isaac  MUST  sleep in his bed, do not sleep in Mom's bed or Isaac's bedroom door will be locked.(Isaac's door can only be opened with The Key, Red Key, Cracked Key and Dad's Key)

After sleeping in your bed a cut-scene will play and after the cut-scene the fight with Happy Memories will start, defeating Happy Memories as any character will unlock True Lilly and a new symbol on the character's you was playing as notepad