The scenes you describing sound similar to the first inuyasha movie. hope that this helps =]
If you mean possesed than it's episode 60 - 61 she gets possesed by tsubaki. She also get's possesed in Inuyasha the movie.
Episode 146
The next episode of wizards of Waverly place that comes after "Positive Alex" is "Detention Election".
naruto .com is a place to get naruto info they have a episode guide there. and character info
The CW does not have any details as to when the Spacewalker episode will be uploaded.
In the episode Something You Can Do with Your Fingers(episode 8, season 4).
From the episode, Barely Legal
There are 2 episodes, one is episode 454 "Battling the Enemy Within". In this episode Ash is possesed by the spirit of the King of Pokelantis. However the second one is episode 23 "The Tower of Terror" which is when a Haunter pulls Ash and Pikachu's soul out and says "You are like us now" as translated from Ghost Ash and takes them on a ride, while on this ride, Ash scares Misty and Brock in the process and finds out Misty really "does" care about him.
A Bee Or Something. If you watch Flame War, you can see at the end (when it recommends other videos) Episode 1-- A Bee Or Something.
It was called positive Alex.
No, but I am sure there is something after episode 52, I just can't find it.
Season 2|Episode 16 There's Something About Paulie