Hey Im playing Dark Chronicle(Dark Cloud 2) right now

My favorite is MGS.
Without Kojima I consider it dead. I won´t play a new one if Konami dares to develop.

My favorite series is Zelda, so I think down?

Fallout, is my favorite series, so i'd have to say growth.

Pokémon is all right, probably it's preparing for getting even bigger whenever Pokémon GO is released.

Tough Metroid... :c

My favourite is Heroes of Might and Magic. Unfortunately it's not doing well. Reviewers and gamers hated the last one and the sales are terrible as far as I know. Makes me sad, as I absolutely love it still.

Well Zelda looks like it's just up and down, but if Zelda U comes out only for the Wii U, it will definitely be considered in the decline.

No Halo 2 was the best, 3 was good everything after was chish (chessy dick fishy vag)

Hm, let's see (IPs with 3 or more entries and completely sales unrelated):

Might&Magic - pretty much dead since late 90s, recent Ubi half-assed attempt called M&M X Legacy was not very good...decline

Gothic - hopefully still alive, but practically dead since 2006, with Gothic III being good, but not as good as Gothic 1/2...decline

Fallout - proper Black Isle Fallout has been dead for a long, long time; in addition Bethesda's made sure that everything Obsidian improved in NV was scrapped for FPS-RPG bollocks in FO4 which makes me pretty determined to skip any further FOs ....decline

Tomb Raider - Underworld was last TR game that was actualy TR; my contempt toward Reboot is well known around here, so I won't even bother...dead

Combat Mission - this one is surprisingly still alive and kicking

Zelda - if Zelda U is half as good as people are hoping for, it will be better than most Zeldas...guess on the rise.

GTA - sales are rising, but for me GTA is not so great anymore; GTA V was much better then IV, but nowhere near San Andreas and earlier games....decline

MYST - This IP is no more. It has ceased to be. It's expired and gone to see its maker. This is a late IP. It's a stiff. Bereft of life, it rests in peace. If you hadn't nailed it to the perch, it would be pushing up the daisies. It's rung down the curtain and joined the choir invisible. This is an ex-IP.

Battleground/Campaign series - nothing but dust remains

Warcraft (RTS) - it was on the rise, then put on ice - maybe someday it will be revived

So, I guess pretty grim picture for my favourite IPs.

Super Smash Bros is my fav.

It's kinda a weird case since the 4th installment was split between 3DS and Wii U.

Somewhat unrelated, but I wonder if the non-existance of the 3DS version would've helped Wii U sales significantly...