Artetone and Apollrock

The first is Artetone (the greek moon goddess ARTEmis+sTONE) the evolution of Lunatone.

Hgt: 6'06 Wgt: 740.8 lbs. Types: Rock/Psychic. Evolves by giving Lunatone a Moon Stone at midnight.  

Because Artetone has a larger mass than Lunatone, it has enough gravitational force and psychic energy to push and pull the tides, therefore, it has gained the ability to use water type attacks. 

Then there is Apollrock, (greek sun god APOLLo and ROCK) the evolution of Solrock. 

Hgt: 7'10 Wgt: 1018.5 lbs. Types: Rock/Psychic. Evolves by giving Solrock a Sun Stone at high noon. 

Apollrock's body temperature and pressure is so high that its body's crust was not strong enough to contain it. Therefore, Apollrock has occasional solar flares of intense heat and is able to use fire type attacks! It has a high enough gravitational force that it picks up rocks and other debris as it floats along.