None. However, you're thinking of Neptune, which is sometimes farther from the Sun than Pluto. But this is not because of an orbit switch.
Pluto is a dwarf planet and trans-neptunian object. Crossing orbits with Neptune stops Pluto being a planet.
Pluto isn't a moon, it orbits the sun, but it is a dwarf planet
Pluto has three known moons, the largest is called Charon.
Pluto has a tilted orbit (compared with the average plane of the orbits of the other planets). Also, Pluto would be considered a "terrestrial planet", but it is not now defined as a planet. It's just called a "dwarf planet" now.
The terms "outer planet" and "inner planet" are only used for planets. Pluto is not a planet, and it orbits beyond the outer planets.
Planetry orbits are elliptical. Most planet's orbits are nearly circular apart from Mercury and Pluto.
Neptune, the furthest planet from the sun. Sometimes the dwarf planet Pluto comes inside its orbit.
Back when Pluto was a planet and not a dwarf planet, it sometimes Neptune to be the ninth planet because their orbit crossed. Now that Pluto is a dwarf planet, there are only eight planets in the solar system.
Pluto is a dwarf planet that orbits the Sun. It is not known to be a piece of something else.
Pluto doesn't orbit any planets, it orbits the sun. But if you mean what planet does Pluto share a orbit with is Neptune. Pluto sometimes is closer to the sun than Neptune because it cuts into Neptune's orbit.
You might be thinking of Pluto, a dwarf planet, orbits the sun every 247.68 years. Pluto, however, is not a planet.
Because it orbits the same star as we do (the Sun).