as a character, here are the statistics.
Rainbow Cruise <- Personally i believe Ike does well here. However I just lik and am comfortable on this stage so I do good here. Of course MK and Pit so far are horrible to fight here. I'm not sure about anyone else :\
Green Greens <- No experience on this stage :\ banned in NJ/PA/NY
Norfair <- Favorite stages should always have more weight when picking a stage. Ike doesn't do bad here, as Ike has a good platform game due to his sword.
Pirate Ship <- Ike is the best character on the stage. He is ungimpable. Aether protects Ike from Spikes. Aether SETS UP spikes. But the main focus of the stage is not battling in water. Most smart opponents will be afraid to even get near the water if the Ike player does so good in it.
Jungle Japes <-- Ike's worst stage. I have tried this stage in doubles with a Falco. I ended up dying 3 times due to water :\ without life stealing. Died 2 times in the first minute. Killed the other team 2 times. partner dies. Killed one guy and two more times and then its one stock vs 2. I fall into the water and die.
Halberd <- This stage is great for vertical killers. Ike does not lack those kind of kill moves so it's only personal preference.
Now I'll list more stages:
PS1 <- Does pretty well, since there are a few walls to wall infinite. However, doubles prevent it a bit.
PS2 <-- this is my personal favorite stage. Its my usual CP too since PS is banned
Ice provides get mind games with sliding DANGEROUS smashes. Air makes Ike's uair even more dangerous since everyone's air mobility is worse. Electric, the belts are good ways to fsmash then the stage throws your off so you have no ending lag. Earth provides a wall to wall infinite, otherwise its just a stage with a rock and a platform on it.
Also, you'll need a good nuetral. Battlefield is the prefect nuetral. Good for both Ike and G&W with their disjointness of doom.
FD is a good stage, since projectile spamming is bad with a G&W there. Lylat is iffy, since it does gimp Ike with a simply 1 inch tilt away from him. Yoshi's is fairly a good stage. Smashville is the most balanced stage ever xD (Minus Snake)
Frigate it self is a bad stage for Ike. However, if Ike is comfortable and if his partner can protect him when he recovers, its not as bad. 2nd worst stage.
After that is RC statistically. (Which I disagree with :\ but I can't really put a different stage there..)
Personally for doubles, besides the stage, you guys need to able to utilize the stage as a team. Bad stages for one person can still work out. And good stages can backfire. All depends on how you guys work together on it.
PS: When KLo showed me the pic of Ike and Pikachu, I instantly made it my avatar. Its the best picture ever of Ike + Pikachu :D