@Background Pony #5A49  
He’s only a baby by “dragon” standards, but not an actual baby by “pony” standards (compared to the Cake twins)
 
And yes, I know he was born before the Main 6 were fillies, but what i’m saying is that Spike has been shown to “age and grow” faster than ponies do in 1 day, so his age can also be altered in the Equestria Girls universe just because of how differently dragons “grow and age” compared to ponies.
 
Anyway, none of this makes any logical sence compared to how humans really “grow and age” so why bother trying to make any sence out of it. They should just make some shit up and say “he’s just different compared to ponies” and make him the same damn age as them in the EG universe. They said the same BS when they decided to make him a dog, so why can’t they say it again about his age and turning him into a human? instead of complicating things more for Spike.

@Background Pony #30AA  
I don’t disagree with Spike being older than the CMC. I fully think that’s how it is in Equestria.  
But my point is in the EQG world, it’d be too much trouble to create a whole new age range (older than the CMC but younger than the Mane6) just for him. Since a big part of Spike’s character is being a “sort of little brother” to Twilight, then I think its more realist to think that (at least in the EQG world) they’d put him the CMC age range.
 
One question though, when has Spike been shown “growing and aging” faster than ponies? If you’re talking about the episode Secret of my Excess then that was an exception and didn’t represent his actual growth rate (since he was back to his real age afterwards). On the contrary, he was born when the Mane6 were little fillies (arguably younger than the CMC), and while they’re already adults, he’s still considered a “baby” of his species. If anything, he ages waaaaay slower than a pony. Further supported by how dragons can apparently nap for 100 years.

@Background Pony #5A49  
I can’t say I completely agree with you, because I think Spike is a bit older than the CMC.  
If they ever make Spike a human based on his maturity, he should be a bit taller and older than them.
 
But since Spike has been shown to grow and age quicker than even the Mane 6, he could also be the same age as them as well. So there’s no real excuse for them not to make Spike the same age as the Mane 6 (and Sunset) if they ever plan on turning him into a human later.

@Background Pony #8F74  
But in the human world, that seems to be about the same difference the Mane6 have with the CMC.  
If you’re ok with that, then yo were agreeing with me.  
Spike’s more mature than half of the Mane6 (at least) on most ocassions (there are some exceptions, for that applies to everyone sometimes) but he’s still physically younger than them. I really doubt that if they made him human, they’d create a new age range just for him. So far in EQG there’s only 3:
 
-Teacher/Principal (Cherilee, Celestia, Luna, Cadance)  
-Highschool Mane6-level students (Almost everyone)  
-Middleschool students? (CMC, Snips and Snails)
 
If they made Spike human, they’d put him in one of these categories, and even though his mental maturity is definetly way closer to the Mane6’s than the CMC, I think its more realist to assume he’d be put in the 3rd one.

@CogWeaver  

 
Probably should have said 4 to 5 years younger, since he’s supposed to be a bit more younger than Twilight.

@CogWeaver  

Yes, either make him the same age as them or at least a few years younger than them (like say 3 or 4 years)  
then I’d be ok with him being a human. But younger than that, then no.
 
I’d rather he be another badass talking animal (like Garfield, Salem, and Scooby Doo) than him being a little kid who shouldn’t be hanging out with highschool girls 24-7

@CogWeaver  
I think they just wrote their selves in a corner by trying to deny a Spike/Rarity subtext, but in doing so they confirmed their was something to be denied. If you want to decide where Spike would stand as a human in E.G. universe Spike would be stuck in that place were you are both older and younger than most people you know. His body would be young, but his mind is old.

@Background Pony #8F74  
So you’d prefer either dog form or mane 6 (Sunny) aged, and not have him the same age as the CMC (who aren’t really little, so to speak, they’re supposed to be freshmen I think, but w/e)? Yeah alright, shipping aside, that seems fair - I mean like you said, he is often more intelligent/mature than a bunch of the mane 6, so I could very well see him being Mane 6 aged (or even a little older? …Nnnah, maybe not), going through a very interesting transition from being treated like the “kid brother” all the time, to borderline-to-over-the-line getting treated like a pet, all the way to now being seen as an equal of some sort to them.
 
‘Course, shipping un-aside, I personally ship Spikebelle most prominently, so if there were to be any shipping, or even ship teasing, I at least would prefer him to be CMC aged.  
…But then on the other hand, it’s not unheard of for seniors to date freshman, so even if Spike were Mane 6 aged… Plus he’d have more options what with being more on the Mane 6‘s level and… Hrm.  
I feel like this isn’t really something that will come up, so adult-er Spike might be more likely, unless the writers have use for him elsewhere, but it’s still fun to see what shipping options there are.

I guess he completely misunderstood the meaning of puppy love.

@Background Pony #5A49
 
as a little kid?  
 
I prefer him as the cute smart mouth talking dog he already is.

(and hopefully for EQG 4 in the last scene in Friendship Games where human Twilight sees pony Twilight)

@Background Pony #5A49  
That’s what CogWeaver got into though, the writers probably wanted to use him as a magical companion. Him being a talking dog didn’t just sell Twilight’s story in Equestria Girls, it was part of what intimidated Cinch into staying quiet about what had happened at the Friendship Games. Of course he didn’t need to be a dog for that, a talking iguana or something would have worked fine.
 
@CogWeaver  
I was more thinking that they might have regretted it after the first movie, but by that point they couldn’t go back on it without some time-consuming explanation. I don’t think the writers wrote the first movie knowing that there would be a second one. That’s why there was no spoiler for Rainbow Rocks in the credits of Equestria Girls like there was for Friendship Games after the credits in Rainbow Rocks.

@Background Pony #8F74  
The ages are already fucked up in the human world. The Mane6 are not highschool students (and Photo Finish certainly isn’t either) and the CMC shouldn’t be there at all. I don’t have much of an issue with that. I just want him to be human because messing with his age isn’t that annoying for me (they did with most characters anyways) but changing him to a species that is considered a pet? That’s far more insulting and demeaning.
 
If they make Spike the CMC’s age, they could simply say its because for a Dragon, he’s still technically a kid. He’d just look like a prodigy kid compared with the other kids his age/grade.

@Background Pony #5A49  
Pretty much this entire post has been my thoughts on the subject. Well, except for the first part about not getting my hopes up, I still get my hopes up, but that’s just me.

@Background Pony #06E4  
Which will always rightfully get the reaction of  

 
 
@PoolofCarp  
It’s always hard to say what writers of stories are thinking, as they have the answers to things you haven’t even begun to question! It doesn’t feel right to say they regret the decision, but every choice made in designs was processed through a team of writers and other staff that approved the concepts and came together to knit a cohesive story, so clearly Spike being a dog has had some use in the story they wanted to tell - and maybe that’s it, if Spike had been anything other than a dog, or even if he had been human, it might have changed the course of the story in a way the writers hadn’t agreed upon.  
I mean, the scene where Spike and Twi reveal that they’re from another reality comes to mind: if Spike had been a human, there wouldn’t be much proof to go off of that the two had come from some different place or other - but being a talking dog raises all kinds of questions.  
However, if that was all the use for Spike’s design in being a dog, then it’s finished, we can stop doing that now.
 
 
@Trahzo  
And that makes me so happy that they’re doing this, if they really are! I actually hadn’t heard of what the 4th movie would be about or what things might take place within it, so maybe the writers really do know what they’re doing with Spike’s character. (I just hope the animators don’t fumble his design… No pressure)
 
 
@Background Pony #06E4  
I meant in what it looks like, because yeah, Spike is just as intelligent as the rest: that’s why a pony+dragon relationship could work, intellectually at least. Physically, it’s at least implied somewhat that those kinds of relationships work that way, too, possibly dragons and pony genes not being too far off that things get dysfunctional.  
Humans and dogs, however… no, sorry, not gonna happen, not in a show like this, even if the dog in question is on human-level intelligence, so it just gets awkward when you tease Spike’s crush on Rarity when he’s in dog form.
 

 
I honestly didn’t mean to incite such a discussion out of this - like I said, what I said above was more heated than I really thought about the issue, I was just… coping with other things at the time. So anyway.

@Background Pony #5A49  
I prefer him as a dog and not a little boy, because I don’t consider him as little kid compared to whaever age the CMC are. If they made him a little boy, I would have found that a lot more insulting and disturbing too.

@Trahzo  

Even though I want this to happen with every fiber of my being, I know enough to not get my hopes up at all.  
They’ve hurt me too many times already.
 
And its not even about the shipping for me. I don’t care. I want him to be human because he fucking deserves to be human in the EQG-verse. He’s not mentally inerior to the Mane6 (in fact it could be argued he’s superior to half of them at least), he’s a completely sapient creature no different from the ponies…and he even looks more human than them to begin with for crying out loud. I get the whole “it would’ve been weird to have Twilight hiding a little boy in her bagpack” but that boat has sailed. Humans now seem to be pretty used to magic being thrown around in their wolrd. So have Twilight alter the mirror (she’s already done it once), or use a spell on him, or have the magic of friendship override the mirror’s effect on him or whatever you like. But make him human already…
 
We already have the actual dog Spike to keep the token cute animal companion trope. If that’s not enough make it so he can change from dog to human and viceversa or something like that. Damn, I thought I was over this.
 
Also, the Diamond Dogs. That had to be trolling.  
I swear. Just when I was starting to make peace with dog Spike when those things showed up in Rainbow Rocks.  
In what conceivable universe those things can be human while Spike is still a dog?

@PoolofCarp  
I don’t think so, I think they made him a dog on purpose. For whatever reason, we may never know.  
If the writers wanted him to be a human, they would have done it by now by using magic on him.  
Like they did with him in Friendship Games, Spike the “real” dog can talk now.

@PoolofCarp  
My in-universe explanation: his alternate self just happened to be a dog. Kinda like Rose was a dog in alternate universe in New Doctor Who.

I wonder if they regret making Spike a dog. They must have had a brain-storming session at some point. It’s understandable they had to keep him a different species to stay parallel with FiM, but nobody thinks it’s weird when he talks in the pony world, and the social difference between a dragon and a pony is obviously quite different from that of a human and a dog. I don’t know what the alternative would have been. Leave him in Equestria maybe?

@Background Pony #06E4 - That was an April Fools Day 2014 prank from  
the Hub Network, about 19 months before it was changed to Discovery Family.

@Background Pony #06E4  
Sadly, that’s an april fools prank I wish was real!

@Background Pony #8F74  
@Trahzo  
Or in a third, sci-fi world :D :  

@Background Pony #8F74
 
 
@CogWeaver
 
We might get a 4th movie with the possibility of Spike becoming human, ever heard of Equestria Girls Legend of Everfree?

@CogWeaver  
I too would like to see Spike turned into a human at some point, even if it’s the other Spike who’s actually a real dog in the EG universe. But for dragon Spike, there’s really no point for him to be human because this would create a lot of problems for him in the EG universe. For example;  
If you’re a sparity shipper, you know he loves pony Rarity, not human Rarity.  
If you’re a spilight shipper, it doesn’t matter if he’s a dog and she’s a human in the EG universe because Spike is still a dragon and Twilight is still a pony on the inside, and they’ll be pony and dragon again once they go through the portal that takes them back to the pony universe again.
 
This would make a lot more sence if they made the “real” dog Spike a human, because at least he wouldn’t have to go back to another world and leave behind the girl he loves forever.