I am assuming the mods are allowing a little more leniency with those particular rumors given that the source got some names right in the past.
Someone had mentioned that Malimar could come from "Malicious Calamari" and Inkay was obviously a reference to the "ink" creatures like Octopi can produce. But, a little later it occurred to me that the full wordplay is probably based on Stingray. So it's:
Inkay (Stingray) -> Malimar (Squid)
The weird little bits of this piece of info from pokebeach started to make sense to me after this connection.
Take a look at a stingray here: http://upload.wikimedia.org/wikiped...na_NOAA.jpg/800px-Dasyatis_americana_NOAA.jpg
And here is a photo of a squid: http://upload.wikimedia.org/wikiped...Loligo_vulgaris.jpg/800px-Loligo_vulgaris.jpg
The head of the stingray has a very similar shape to the mantle of a squid. If you imagine a stingray turning into a squid, the squid's head would grow where the stingrays' tail is and it would continue to move in the same way (stingray's head/squid's mantle first). So the idea of flipping the 3DS and having Inkay evolve with the squid's head popping out of the ray's behind (as if by gravity) doesn't seem quite so strange anymore...lol
I won't start a debate on the validity rumours since that's a dead-end until GF reveals more. BUT, if someone made this up they really thought through it and came up with something crazy and random enough that it could be GF's idea while resisting the urge to offer an explanation of why it's clever.
I'm assuming Malimar will have two heads with different temperament, like Girafarig, and the Psychic/Dark typing plays on that. I always thought that if there would be a Girafarig evo it should be Psychic/Dark.The evolution's name is also dangerously close to being a palindrome like Girafarig. In fact, since spelling in the leaks in unreliable (Pancham/Panchum) it could very well be Malamar which is even closer.
It's interesting to see them take more inspiriation from sea-dwelling creatures without making them Water-type. There is so much interesting life in the oceans yet we already have so many Water-type pokemon. I think it's a good move.
Psychic/Dark has only one weakness, Bug, even assuming the information about the new type is true. Unfortunately, it's a quad weakness and there are few resistances besides the Psychic immunity. The extent of its usefulness will come down to stats, ability and movepool. As shown by Spiritomb, Drapion and Skuntank, Dark types without a Fighting weakness can find niches as a specially-defensive responses to Ghost or Psychic offense and as Pursuit-trappers. But this new Pokemon will be in absolute terror of a surprise Signal Beam or U-turn.