According to the goddess Wiki, who knows all, the official mimobot back story is that the ears exixst because the mimobots are “creatures.”

wikipedia.org/wiki/Mimobot —
mimobots are happy, memory-loving creatures who hail from the planet Blõôh in galaxy 4210 where a massive memory-loss epidemic is spreading. To find a cure they have enlisted the help of humans by creating mimobots clones and “flashporting” (transporting) these clones to Earth on a memory recovery mission. In a symbiosis of sorts, humans using mimobot clones to store personal data on the clone’s internal flash memory, send vital “memergy” back to Blõôh. With the help of RALF computer, this memory transfer is the mimobot’s only hope to help cure their collective amnesia and save them from the dreadful fate that lay before them.