Finally this silly comic is done. I sketched it out Monday and Tuesday, then took a break worked on it a bit Friday, and finally finished Sunday by putting in about 10 hours today to finish it. I'm glad its finally done and I can move on.
The only time it seems reasonable for Shining Armor to have been seen were at the Grand Galloping Galla and during the celebration for defeating Discord. Pretty much every other time they go to Canterlot it is rather sudden and only for a very short period of time. It also seems reasonable that he is not mentioned while in Ponyville. No one's family is really talked about. It would seem weird if Twilight just suddenly mentioned a brother out of nowhere for no purpose whatsoever. If he had lived in Ponyville then it would be a big deal, but he lives in Canterlot and is a Captain of the Royal Guard. There is no way he is not very busy dealing with things for the Princess and with the sudden nature of Twilight's visits to Canterlot it is reasonable to assume he is busy and might not know she is even in town.
This points out of the biggest things that is so fundamentally fcking wrong with Shining Armor just in general that TvTopes.org actually links to this comic when they bring him up on the page covering the trope, 'Remember the New Guy'... which is how I found this comic, to be honest.
Never mind that when Twilight says that he was her only friend as a filly, it directly contradicts what the first episode establishes about how Twilight initially didn't think that she needed any friends. And that stupid song that tries to tack on his back-story just makes the 'why are we just now hearing about this guy?' aspect of his flawed and lazy-ass design ever more damning, bull sht Retroactive Continuity than it already was... ergo this comic.
And yet, even with all of it's crippling flaws ('Retcon,' 'Remember the New Guy,' 'Outside Context Villains,' and a severe case 'Aesop's Amnesia' just to name a few), 'A Canterlot Wedding' still somehow manages to be better then 'The Crystal Empire...'
Found it funny but consider, he is the (or a) Captain of the Guard. Does he have time to be introduced in any previous episode? And Twi was also annoyed herself that he hadn't been keeping in as close a contact.
He would at least know about Twilight having her entrance exam... but it doesn't matter because he was conceptualized really late into the development of the show, so they obviously put him in anything before that.
Pinkie Pie, you said it. The writers could at least have given SLIGHT mention to him before the end of the season. Like a throwaway like by a character, especially Twilight. Just establish that he does in fact exist!