Ah, I've actually been working on theories.
Robot #22 Was an A-hole, so she disassembled him.
Robot #24 Was clumsy, he fell over the handrail at the lab.
Robot #25 Went see Riverperson, but fell into the river.
Robot #29 Was assembled wrong and didn't function.
Robot #44 Had a coding error when Alphys gave him his personality; he decided to kermit sewer slide.
Robot #46 Was training to be a royal guard, but was damaged beyond repair.
Robot #48 Pissed off Undyne.
Robot #49 Had a damaged core, and eventually ran out of power.
Robot #62 Had an internal error and all he ever saw was the error message.
Robot #69 Had an invalid serial key, thus he could not be activated.
Robot #65 Became infected with a virus that destroyed his software.
Robot #67 Found a way to input his AI into a simulated version of Heaven.
Now they all are in a deeper room sitting in separate containment cells.
