Pluto was recently reclassified as a dwarf planet after being considered the 9th planet for over 80 years. This was due to the discovery of several Pluto-sized objects is similar orbits to Pluto, and the suspected existence of hundreds or thousands more.
Only two objects in history have been called planets and then lost their planet status:
There are only 2, now that Pluto has lost its status as a planet. They are Uranus and Neptune.
Pluto
Pluto was ranked down to a dwarf planet in 2006
I think you mean Pluto, and the answer is no, Pluto is not a planet. It used to be but it was discounted as there are other similar-sized objects in space which have not been classified as planets because they are too small. Therefore, Pluto was degraded to a dwarf planet.
Pluto is no longer classified as a planet, but rather as a dwarf planet. The celestial body still exists -- it has simply lost its previous classification status.
There are only 2, now that Pluto has lost its status as a planet. They are Uranus and Neptune.
Neptune, Pluto has lost its status as a planet. Since then, many dwarf planets have been discovered beyond Pluto.
Pluto lost it's "planet" status and now is called a dwarf planet.
Pluto
All except Pluto. Which has recently lost its status as a planet, changing the answer to "all of them". With the semantic exception of Earth, I suppose.
Pluto recently lost its status as a planet and is now a dwarf planet.
mercury is the smallest planet now because Pluto's status was changed from planet to dwarf planet, making mercury the smallest planet.
Pluto
Pluto was ranked down to a dwarf planet in 2006
Pluto - it is now categorised as a dwarf planet
Mercury was listed as the second smallest planet. Since Pluto lost its status as a planet Mercury is now the smallest planet.
Pluto was regarded as the ninth planet, from it's discovery in 1930, until it's reclassification as a dwarf planet in 2006.