Okay, tweaked a few things.
Mollux, the Lava Lamp Pokemon
Black: It is often seen playing with groups of SHUCKLE, although it becomes violent when territorialy threatened.
White: It hatches its eggs in deep-underwater volcanoes. The magma seeps into the egg before hatching.
O.K, to start off with, I wanted to keep to the script with the "........ Pokemon" description. We need to say what Mollux actually is, and how it differs from other pokemon. It is a lava lamp, hence the description.
Now for the entries. The Black entry is all about Mollux's interaction with other pokemon, and Shuckle is an obvious choice. The pokemon are similar in many ways, and this similarity has been referred to in previous threads. The description shows two sides of Mollux's emotions. One, a friendlymon, the other violent and moody.
The White entry has been changed dramatically. I wanted to include how Mollux has come about, how it was made. No, not by a Smogon artist, but by a lava-ridden egg. This makes sort-of sense. The lava seeps into the egg, giving it its liquid interior, whilst some hardens to form the outer shell. This could also give another reason to why Mollux is so pink... hardcore sunburn.