The Original
The original Syaoran appears as a tattooed figure floating in a tank in Fei Wong Reed and Xing Huo's headquarters (who, instead of being blind in his right eye, was blind in his left). He remains in this tube for roughly 120 chapters, until he regains his power and escapes. With the assistance of Xing Huo, he is sent to the Witch of Dimensions, Yūko Ichihara (he can be seen making a cameo appearance in Volume 9 of xxxHolic). It is then revealed that he is the original Syaoran and was captured and cloned by Fei Wong Reed. It is implied that his real name before being imprisoned is not actually Syaoran. As when Sakura asked about it, he started to say no, changed his mind and said okay.
After leaving Yūko, Syaoran meets up with Sakura and the gang and tries to stop his clone from harming its friends. However, he arrives too late, as The Clone already began its assault. He then reveals that he was watching and learning everything during his captivity through the Clone's blind eye, revealing that he was, in a sense, with the group the entire time, and that he knows everything the Clone knows (from archaeology to Seishirō's training). Before the battle begins, Syaoran reclaims his heart from the Clone and regained vision in his left eye. After releasing lightning based magic on his clone, Syaoran moves to finish the Clone off but Sakura's pleas for him to stop (she was unaware of the situation) halted him long enough for the Clone to stab him in the leg. The Clone then roughly shoves a feather into Sakura and moves on to the next dimension, leaving Syaoran on the ground unable to stand.
After the Clone becomes an antagonist, the original Syaoran takes the role of protagonist of the series (now simply known in the series as "Syaoran") and becomes a "leader" of the group, like the Clone was, in order to stop Fei Wong's plans. He cares deeply for Sakura, and knowing that she loves his clone saddens him. Because he is a good person, he tries his best to keep his romantic feelings towards her quiet, as to not trouble her anymore. This goes against Kurogane's wishes as he wanted Syaoran to get close to her so she wouldn't feel alone.
As Syaoran continued to lead the journey with Sakura and the others; Sakura acts very distantly with him and did not see him as a new companion. It is revealed that she acted so coldly towards him because of a vision she saw when Fay touched her back in Tokyo. She finally does call him "Syaoran-kun" (which she used to call the Clone) at the end of the Infinity Arc, causing Syaoran to think she was leaving because of him. She denies this, but then Fay, possessed by a curse, stabs her. It is later revealed by Fei Wong Reed (and Sakura, in xxxHolic), that Fay was supposed to stab Syaoran, but Sakura changed the future so that the curse was activated before this event.
When Sakura was stabbed, she split up her body and soul. Yuuko tells Kurogane, Fay, Mokona, and Syaoran that the body should be rescued first, then the soul. They group then travels to Celes country (where Fay is originally from) to retrieve Sakura's body. Syaoran develops a severe headache upon arrival, and collapses due to it. This headache is connected to Watanuki, as shown in xxxHolic. It, however, does not stop him from protecting Sakura's soulless body from Ashura, who uses his magic to show Syaoran, Kurogane, and Mokona visions of Fay's dark past.
After King Ashura's defeat, the Tsubasa group returns to Nihon Country where Syaoran wakes up to find Sakura's soulless body in a magical sakura tree which heals the wound Fay gave her. This puts Syaoran at ease for the time being until the arrival of Seishirō, who had sensed Fay's vampire blood. He then goes into battle against his clone's former teacher, proving he too has learned from him by looking through the Clone during his captivity. Syaoran enters this fight to get back the feather from Outo country. After Syaoran unleashed his ultimate spell (all four of his elemental spells combined) on Seishirō, he reclaimed the feather and was sent into the Dream alone to rescue Sakura's soul.
Within the Dream, Syaoran finds Sakura and encounters the Clone, who has just entered, looking for feathers. The Clone senses the feather from him and both of them quickly summon their respective blades. The Clone attacks both Syaoran and Sakura, despite Sakura's pleas for The Clone to stop. Syaoran then places Sakura in a protective wind barrier and then announces to the Clone that since they are one in the same, he will end their dispute once and for all.
Both Syaoran and the Clone begin with an exchange of sword blows and powerful kicks. Sakura's pleas for them to stop falls on deaf ears as The Clone is growing more powerful and Syaoran is somewhat distracted trying to protect her from it. Syaoran and The Clone then release lightning and fire-based spells, respectively, towards each other, destroying everything in their blasts' path. The Clone's growing power then affects its fire spell, which then becomes too powerful for Syaoran's lightning spell. Syaoran takes a painful blow as Sakura tearfully screams out his name in horror as he is incompassed in flames. It should be noted that she does not call him "Syaoran-kun", which is what she calls the Clone and Syaoran prior to the fight, but rather screams out "Syaoran" without the suffix. This is very important, as she only called the Clone "Syaoran" before she lost her memories, and by dropping the suffix it indicates something of deeper meaning- It may be as simple as she accepts him, or it could be she recognizes him as the original. She first called him "Syaoran-kun" back in Infinity.
As The Clone moves in to kill him, The Clone decides to take the feather that Syaoran placed within himself (thus how he entered the dream world) but Syaoran awakes and struggles for the feather. The feather transports both back to Nihon Country. After this, both Syaoran and The Clone begin their final battle.
As they both reach to grab the feather/strike each other, Sakura gets in the way and saves him from being stabbed by The Clone. As he screams out in horror she tells him she is not the real Sakura, she is just a a clone. [a clone of both body & soul]. The Clone Sakura said to the real Syaoran "Your Sakura is waiting", then she falls into the arms the Clone and confesses her love for him.
After that, Syaoran falls down as he has been released from the black goop that invaded the area for the short time Kyle appeared. Fay rushes over to help Syaoran up and then Syaoran glares hard after Fay informs them that The Clone is gone.
After this, the clone situation regarding Sakura is explained further. Syaoran asks Yuuko to tell them where both of the Sakuras are. He then confidently remarks: "I'll never allow Sakura to die". Kurogane, Fai, and Mokona then agree to help him on what appears to be their final stop. Of course Yuuko says there is a price, which was already been paid for by Watanuki. He paid his memories of his past that's why when he was in the Dream World with Sakura's clone soul he didn't remember his parents' names at all. It was paid beforehand because he wanted to pay back the real Syaoran for saving his life when he fell out the window.
