Rocky planets are Mercury, Venus, Earth and Mars. The rest are gas giants. There are icy and rocky dwarf planets, but they are not planets.
The rocky planets have been well studied by dozens of space probes, satellites, and landers.
A few dwarf planets (Ceres, Pluto, a couple others) have been studied by probes, satellites, and at least one lander. Same for moons of several planets.
Now what was your question about?