These are the kind of permanent magnets that you magnetize with currents and strong magnetic fields, so yes. You can alter their magnetic fields by exposing the

These are the kind of permanent magnets that you magnetize with currents and strong magnetic fields, so yes. You can alter their magnetic fields by exposing them to adjusted currents and magnetizing fields that undoes the original magnetization and remagnetizes them. Note that your robot won't be very small - you need a lot of current, and thus cooling if the programmer is small, batteries that's big enough and you need to avoid ferromagnetic objects in the surroundings = shielding.