does it have a relation with any other planet?
Yes, with Neptune.
Pluto
 However, Pluto is also protected by its 2:3 orbital resonance with Neptune: for every two orbits that Pluto makes around the Sun, Neptune makes three.
what is pluto? A dwarf planet in the Kuiper belt. who discovered it? Clyde Tombaugh when? 1930 what is its origin? One early hypothesis was that Pluto was an escaped moon of Neptune. what is its mass? 17.7% that of the Moon. what is its size? Its surface area is , or roughly the same surface area as Russia. what kind of atmosphere does it have? It has a tenuous atmosphere consisting of nitrogen (N), methane (CH), and carbon monoxide (CO). does it have a moon? UNANSWERABLE
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Pluto [SEP] Relationship with Neptune
However, Pluto is also protected by its 2:3 orbital resonance with Neptune: for every two orbits that Pluto makes around the Sun, Neptune makes three. Each cycle lasts about 495 years. This pattern is such that, in each 495-year cycle, the first time Pluto is near perihelion, Neptune is over 50° behind Pluto. By Pluto's second perihelion, Neptune will have completed a further one and a half of its own orbits, and so will be nearly 130° ahead of Pluto. Pluto and Neptune's minimum separation is over 17 AU, which is greater than Pluto's minimum separation from Uranus (11 AU).