Okay, so a lot of the same questions are being asked all over the board, and it's getting pretty out of hand seeing "Is X confirmed for Y type" or "Will X evolve" in every thread, so let's create a general Q&A thread for those questions that have been long answered, but some people just aren't in the loop for.

Helioptile -> Heliolisk. Normal/Electric. 2 Stage Line. Evolves using Sun Stone.
Flabébe -> Floette -> Florges. First stage is Fairy, second and third are unknown. Evolution method is unknown.
Inkay evolves at level 27 by turning the 3ds upside down. 2 stage.
Dedenne is a single stage.
Skrelp has an evolution, but its type and name are unknown. Although Clauncher evolves at level 37, Skrelp does not.
Skrelp -> Clauncher. 2 stage, both pure Water. Evolves at level 37.
Both Meowstic genders take up the same Pokédex slot. It does NOT have an evolution, that slot is taken by Kekleon.
Honedge -> Doublade -> Aegislash. All Steel/Ghost. Honedge evolves via level up, but Doublade is unknown.
Carbink is single stage.
Hawlucha is single stage.
Phantump -> Trevenant (Orotto). Method is unknown.
Pumpkaboo -> Gourgheist. Method is unknown. Gourgheist has at least 2 forms.
Klefki is single stage, Fairy/Steel
Goomy -> Sliggoo -> Goodra. Goomy and Sliggoo are pure Dragon, Goodra is unknown. Goomy evolves via levelling, Sliggoo is unknown.
NOTHING is known about Noivern other than what is on the Pokémon site. No one has discovered it yet, or anything resembling a pre-evo.