Lombre evolves into a female-only counterpart called Chicadios (lame name, I know).
It will be some kind of mermaid, with the sombrero now forming some kind of mask. She will also be long and slender. Eyes and mouth are visible through the mask, she has big eyes and the derpy lips are gone. Legs are gone too and replaced with a long fish tail. It does have arms. Oh, and typing is Water/Psychic.
Official Jigglypuff of the Super Smash Bros. Wii U boards