He’s the only doll (besides the Weird House) who isn’t swayed in some way by Ken’s takeover
He also declares himself as “Ken's buddy" (making canon his official box description) which makes his inability to be swayed more interesting
He has bendable legs (probably the only reason he tries to jump the fence instead of going around like everyone else)
He easily decked a half-dozen construction Kens and could probably singlehandedly win the Ken fight
He seems to know more about the real world than most Barbies
He knows what NSYNC is
He knows about other Allan copies living in the real world (I’m trying to figure out if he made this up to convince the humans he can live in the real world, but even if he did, how does he know what NSYNC is???)
I'm concepting things way outta order in this story, but I'm sure you can piece things together. Context is for a storybeat where, after defeating and capturing Adagio (thus having all three sirens in her possession), Sunset enacts her revenge plot to release the sirens on Canterlot as Thea discovers she's been manipulated. In a confrontation, the two scuffle and fight over the siren orbs while Sunset struggles with her conflicting wants and emotions.
I'm not the kind of person that's like "Here let me fix the canon" usually but like holy crap gen 5 implied a lot of messed up shit about our hero Twilight Sparkle lmao