It is spherical ✅, but: -Hasn't cleaned its orbit, as it crosses Neptune's. ❌ -Doesn't really have a moon, but rather it goes around a center of mass OUTSIDE Pluto with Charon. So they both go around in an harmonic dance. It's technically a dual planetary system. ❌ -It sometimes grows a tail. 💀❌❌❌
Also mind that Eris, a further dwarf planet in the scattered disc, is more massive (but slightly smaller), spherical, has a moon and is very much a better candidate if we included it in the planet list. However, its orbit is not cleared as well. So not planets: kings of the asteroids.
Neptune, Jupiter, even Earth haven't cleared their orbits either. en.wikipedia.org/wiki/Clearin...
Trojans in Jupiter are considered part of a clear orbit, because they follow Jupiter in lagrange points. Its stupid to compare that situation to Pluto's, whose orbit is inside the Kuiper belt. As both orbits are *not* the same, we can compare individually Neptune's and Pluto's orbits... +
And Neptune's is basically empty (>99% of the mass is in the planet), while Pluto is basically another round big ball of ice, basically. For further discussion, you can check on the internet where there is basically endless info.