Since time of drama immortal, there's been a plot device that the viewers need to be informed what's going on while the characters in the story should not know, even if this necessitates something that should be painfully obvious if you were in that situation.
It's called a suspension of disbelief [http://en.wikipedia.org/wiki/Suspention_of_disbelief].
So don't let it bother you that Ash & Friends apparently are painfully ignorant to Team Rocket's disguises. You're just supposed to imagine that that the disguises did their job.
On an unrelated note, I'm surprised how many people read the "Ash is really in a coma" article and actually took a gross reinterpretation as something worth sniffling over. It's not that hard to creatively reinterpret anything like that.
It's called a suspension of disbelief [http://en.wikipedia.org/wiki/Suspention_of_disbelief].
So don't let it bother you that Ash & Friends apparently are painfully ignorant to Team Rocket's disguises. You're just supposed to imagine that that the disguises did their job.
On an unrelated note, I'm surprised how many people read the "Ash is really in a coma" article and actually took a gross reinterpretation as something worth sniffling over. It's not that hard to creatively reinterpret anything like that.