This is a piece I did for a fake Hoenn mega evolution contest I entered on Deviantart.
Unlike my usual Nega-Mega evolutions, I tried to make this design a little more natural and simple (or at least as simple as mega evolutions get anyway), and I wanted to have this mega evolved form emphasize Camerupt's enhancements and natural abilities. I also got the idea from Mega Blastoise to turn Camerupt's two humps into one giant volcano, while I took my idea from Nega-Mega Blastoise to add an extra volcano-hump on its head. Lastly, for a special touch, I gave Mega Camerupt a rock harness loosely based on saddles that real camels have
The way I did this piece was by first drawing it on paper, tracing it onto a sheet of primed matte board, and then painting it with acrylics. Afterwards, I scanned the painting onto my computer and used Photoshop to touch up certain areas, clean up the negative space, add outlines, and include the Mega Evolution symbol
Oh, as a fun little side note, the little patch of land that Mega Camerupt's standing is based on one of the battle arenas from the original Ruby and Sapphire games
Also, if anyone's interested, here are the facts and stats I created for Mega Camerupt:
Mega Camerupt:
Type: Fire/Ground
Ability: Moody (to represent how it's pokédex entries mention that Camerupt shoots magma when enraged)
Size: 8'02"
Weight: 585 lb
Stats: HP) 80/ ATK) 165/ DEF) 100/ SP.ATK) 187/ SP.DEF) 100/ SPD) 35
See the official Mega Camerupt here