@Starswirl  
Especially when it wasn’t even explained afterward.

@DoomPony  
So it’s not Trixie, it’s the door that’s magical?
 
I kid, I kid. Still, it’s a little weird to see magic handed out like candy, as long as you’re a highschool girl or a pet. Or rather, without any real foreshadowing. The setup with the smokebomb does not count for setting up actual magic.

@Ihhh  
It becomes a flaw when inexplicable and unexplained things are required to bypass it. It’s a combined flaw.
 
I still think it’s a funny joke.

@DoomPony  
The difference is that your example does not create any internal inconsistencies, it is merely unrealistic, which is not a flaw in and of itself.

@Starswirl  
To be fair, this obstacle doesn’t make real world sense either. No modern school would be allowed to have rooms that people could get locked into without at least one side having an easy way to unlock. This exists solely to keep Trixie out of the climax.

@Background Pony Number 17
 
What does that have to do with her somehow being able to teleport for no reason?
 
@PonyPon  
This franchise is usually self-consistant, and even when it’s not, the inconsistencies are never this blatant, with the possible exceptions of some character motivations and actions, and even then, they usually try to give some sort of explanation.

Overall, pretty nice. Blatant and nonsensical Deus-Ex-Machina aside.

@Ihhh  
Welcome to……This Entire Franchise.
 
Yeah, it doesn’t make much sense, and they shouldn’t keep doing it, but….they will.

@Ihhh  
Well, the EQG Trixie’s never had a friend before.

@Mooncalf  
This series has never established anywhere that this version of trixie has any access to magic whatsoever.

@Ihhh  
Magic, obviously.
 
It could be because she’s practiced for years. Or because of Equestrian magic seeping through the portal.
 
Or maybe she finally has a friend, and is trying to do this for her sake; knowing that Sunset will suffer if she doesn’t succeed. Friendship is Magic, after all.

How the hell does that work?