The combined gamma-ray, X-ray and optical observations of objects like 3EG J2020+4026 and 3EG J0010+7308, provide some of the best examples of Geminga-like candidates. Still, several tests remain to be done to conclusively determine the nature of this object. While deep X-ray and optical imaging can yield further clues, the final test for a radio-quiet pulsar remains in timing measurements, most likely from X-ray data.