The fact that the Drakes didnt always live next door to Bruce, but they bought the mansion because Alfred suggested it, is not nearly used enough in fandom.
Like pls can you imagine 13yo recently appointed Robin Tim moving into this big house and just start exploring it because hey what else is he supposed to do?
Someone had to have lived there before, someone had it build, and this is Gotham we are talking about, you know there is 75% probability it was some villain/rich bastard guy.
What I am saying is Tim definitely finds like some hidden room, maybe a hidden entry to Gotham’s underground system or old caves. (Maybe some hidden room of a secret society? One never knows).
Tim a baby genius but also dumb as a rock “Oh B might want me to build my own Batcave! Makes total sense yeah!”
And he never mentions it because come on is so obvious.
Years later the cave gets compromised and everyone is panicking about where will they set HQ for now and Tim just “Oh! We can use my cave”
…
“YOUR WHAT?!”
This is genuinely funny because im pretty sure this basically happens in the Knightfall arch where batman gets his back broke and goes afk and tim has to babysit Azrael-as-batman and inevitably gets banned from the batcave but is like PSYCHE I CAN SNEAK IN FROM MY SIDE GET DUNKED ON
