I want toi to answer this question truthfully. Do toi think Nobodies have hearts?

I agree that those three had Hearts, and Namine also.

As for the rest, their Heartless were their Hearts, and they didn't have any extra's ou people with Hearts to be around like these guys were around each other, so they really didn't have Hearts...

Personally, I think that nobodies don't have hearts. But special nobodies like roxas (possibly xemnas as well), are able to create a cœur, coeur in nobodies(or at least simulate one), like roxas' effect on axel and xion

I believe they DID but they Lost them in some way.

yes

they dont have hearts, yen sid a dit that himself

i may think yes and no there are many reasons but one is that Roxas was never a nobody in the first place yeah surprising isn't it but anyhow my theory is that only a few can have the power of the hearts like Roxas Axel and Xion while some dont like xemnas who needs it badly

I think they have hearts , but its plus hidden

My theories XD

Xion never had a cœur, coeur but she had true emotion and felt what it was to have a heart.

Axel IDK maybe he has a cœur, coeur he can feel real emotion so maybe. It will be revealed in KH Dream Drop Distance.

Roxas has Ventus' cœur, coeur which not only allows him to feel real emotions but duel wield hell ya!

Namine since she is a speacal nobody she cant remeber her past self as normal nobodies do. So she has no memories of emotion leading on to the creation of her own emotion.(If that makes any sense XD)

Nobodies as a rule, don't have hearts. Dusks, Creepers, Luxord, Zexion etc. don't have hearts.

There are many exceptions to this rule:

Roxas - Being Sora's Heartless, he carries Ventus' cœur, coeur within him when he is created giving him feelings and emotions.

Axel - Axel connects with the Roxas and is able to feel emotions and so forth via Ventus' cœur, coeur within Roxas. He has no cœur, coeur of his own.

Naminé - It's doubtless she even is a Nobody, DiZ simply states it's the easiest thing to call her. Born of Kairi's cœur, coeur of pure light, but encased in Sora's body which held darkness, she took a form similar to Kairi and thus belongs with her. She has no heart, but may not be a Nobody in the first place. She has no heart.

Xemnas - Xemnas carries a few hearts within him, possibly. When Master Xehanort became his two halves, he had his own cœur, coeur within him, Terra's and Master Eraqus'. At least one of those resided within Xemnas' body.

Xion - Isn't a Nobody. She's a Replica of one. Much like Roxas feels because of Ventus' heart, these feelings are replicated within Xion. She has no heart.

Okay, so I posté this on Roxas fanclub, and I believe I should post it here, too. Long explanation, but I believe it'll clear up alot for everyone: It has been revealed as of Kingdom Hearts: Dream Drop Distance, that Nobodies have the ability to grow their own cœur, coeur over time, through experiencing situations that would otherwise trigger feelings. The only officially confirmed Nobodies to have their own hearts are: Namine, Axel, and Roxas. In retrospect, it seems apparent though that all members of the Organization developed a heart, even Xemnas (a bad cœur, coeur is still a heart).

The reason that no one knew was because Xehanort intentionally lied to the nobodies of Organization XIII for his own gain -- if they believed they didn't have a heart, they'd do whatever it took to get one (Xigbar knew, however). I believe that even Yen Sid didn't know that this was possible, as I think he told Sora that Nobodies had no heart, further cementing to the audience that "Nobodies don't have feelings". But obviously, we all know something had to be wrong with that. Since the beginning, quite a few fans predicted that it would be a lie -- and they were all entirely correct.

From the loveable feelings -- Xigbar's sense of humor, Demyx's musical affinity and preference for lazing around, Roxas's adorable preference to ice cream -- to the distateful habits -- Larxene's enjoyment at other's pain, Marluxia's interest in himself and his superiority, Saix's anger and bitterness. From the first time we saw them to the last, all these feelings were geniune from hearts -- their OWN hearts.