This robot will attack you after you opened the last Dam on Mota.
It only depends on which Dam you visited last. You can fight this robot but never will defeat it.
It will be wiser to save your HP for the prison satellite Gaira and defend yourself.
Tracer Base
Floating Robot type on Dezo. This modified version of an Army Eye will be found inside and outside the dungeons, it is mainly located in the Skure spaceport dungeon.
Specter
Floating Robot type on Dezo, a golden version of a Tracer Base. Will encounter you in dungeons and outside.