It's the outer planet.
The terms "outer planet" and "inner planet" are only used for planets. Pluto is not a planet, and it orbits beyond the outer planets.
it is an outer planet
Pluto
It is a outer planet.
The planet that was an outer planet, but was more like an inner planet was Pluto because of its size. The planet Pluto is no longer considered to be a planet.
Pluto
it WAS technically an outer planet before it got downgraded to a dwarf planet
These planets are outer planets.
I'm 90% sure that it is Pluto ;D
Pluto because it is very small and it's surface is rocky.
Pluto is small and rocky, so for years is was the outer planet that was more like the four inner planets. It has since been reclassified as a dwarf planet though.
if you count Pluto as a planet, then yes.