Ask MerriAuthor
As tech mod pointed out, this question's more for you: The western AU requires a blacksmith. And I think Fir Bolg is perfect for the job. Whadda ya say?
Anonymous

Potentially, but the Western AU has become a big group project by this point and it wouldn’t be right of me to eat up a bunch of roles with my own characters.  That could potentially deprive someone else of the role.  If the spot of Blacksmith never gets filled up later on down the line then I see no harm in having Fir Bolg set into it, but I’m going to delay that as long as possible for the sake of fair play.

Well, this is by far one of the best things I’ve seen in a long time.  :3

You could put an orange kitty on some background pony's head every few posts.

Ooo. Adopted bat pony. 7 years old. Dapple grey. No cutie mark. Male. Likes to read and make up stories. On another note, you could always include Sunshine and Meadowlark from Egophiliac's Moonstuck.
Anonymous

I appreciate the gesture, Anon, but the entire point of cameos is to give attention and/or a gift to another user.  So your description here, while nice, is kind of useless to those ends because you’re an Anon.

The Crystal Ponies at least had the excuse of having been magically removed out of reality for 1000 years.  Ponies seem to be pretty foggy on their knowledge of history from back then, and Celestia specifically mentioned that very few Ponies ever knew of the Crystal Empire anymore.
Bat Ponies, on the other hand… are just kinda hanging around, I guess?
One fan theory posed that the Bat Ponies were just normal Pegasi with a Nightmare Night-esque costume change, but Word of God states that Bat Ponies are their own thing.  So… just no representation, I guess.  For the Merri-verse, I want to feature Bat Ponies as a minority in the population, but still present all the same.

The Crystal Ponies at least had the excuse of having been magically removed out of reality for 1000 years.  Ponies seem to be pretty foggy on their knowledge of history from back then, and Celestia specifically mentioned that very few Ponies ever knew of the Crystal Empire anymore.

Bat Ponies, on the other hand… are just kinda hanging around, I guess?

One fan theory posed that the Bat Ponies were just normal Pegasi with a Nightmare Night-esque costume change, but Word of God states that Bat Ponies are their own thing.  So… just no representation, I guess.  For the Merri-verse, I want to feature Bat Ponies as a minority in the population, but still present all the same.

Go nuts.  You can apparently claim bragging rights to “the only Bat Pony foal character in Ponyville” here on Tumblr.  ’Cause if you don’t, I’m going to.
Cameos don’t need to strictly follow canon or in-universe rules anyway.  Heck, I featured Vaudeville, so that should tell you something.

Go nuts.  You can apparently claim bragging rights to “the only Bat Pony foal character in Ponyville” here on Tumblr.  ’Cause if you don’t, I’m going to.

Cameos don’t need to strictly follow canon or in-universe rules anyway.  Heck, I featured Vaudeville, so that should tell you something.

Okay, are there no Bat Pony foals amid Tumblrpone?  I keep digging and am not finding any.  I was thinking I could find one to include as a cameo in my next update to help show Bat Pones represented in the general Ponyville community, but I can’t find any.  o_o

I'm more of a "Death to Canon" sort of guy. Pretty much screw everything you don't need or can't use and place new and interesting concepts instead. Why do we want the showwriters to tell us what Earth ponies can or can't do? Wouldn't that just limit the ability of fans to decide for themselves?

Different strokes for different folks.  It’s my own personal habit to lean as close as possible to canon so as to minimize the amount of potential plot holes that may develop otherwise.  If I go and introduce a concept that is interesting yet has no grounding in the canon, and then the canon later flat-out contradicts it, I’m left sort of hanging with a glaring plot hole I can’t fix.  I stick as much to canon as I can and have gotten a lot of positive responses from my audience for it, both on my dedication to keeping a cohesive setting and the creativity needed to mesh everything together as best I can without taking liberties.  I also find that a lot of my headcanons end up getting confirmed as more canon content comes down the pipeline, which means I’m thinking in the same direction as the creative staff.  I personally feel it’s very important to try and get the same kind of tone and mood of G4 MLP, as that summarizes a lot of its general appeal as a show.

Naturally I can’t be completely loyal to canon, however.  The mere existence of OC Ponies instantly causes issues with that, particularly since I’ve taken steps to believably integrate Merri and co into the canon setting rather than having them stick out as some satellite story unaffected by the world.  That, along with the integration of other Tumblr folk and my own extrapolations on canon concepts, makes the Merri-verse more of a G4 AU.  Heavily inspired by canon, but not 100% loyal to it.

As for folks who take your route and go do their own thing?  Either in partial adherence to canon or wholly off the rails?  Awesome.  It’s all about creativity and having fun with the story, so do what works for you and never let anyone say otherwise.  A lot of the most beloved Tumblrpones around here are their own thing without much concern for sticking to canon, after all.

I tried my hand at adding Ask the Night Guard events to the Merriweather timeline, and noticed: Merri joined the equestrian military at 10? The same age the CMC are now? What'd she do in the military while still a young filly? I need to do a deep archive binge, don't I?

I really do need to revise that timeline as it is no longer accurate.  While planning out world building with Hazel Hooves, I decided to push Merri’s age up a year or two before she joins the military.

In any case, joining the Equestrian Military at a young age doesn’t mean she’s slapping on armor and marching out to tackle Hydras as a filly.  She would have spent a number of years in training with military academy, boot camp (horseshoe camp?), and low-tier guard service in her early years.  It would have supplemented a traditional education.  Merri wouldn’t actually have been out in the field on real active duty until she was a teenager.

I base the logic of the low age of enrollment on my observations of how Equestrian society seems to function with jobs and career training.  With Cutie Marks playing a big role in how Ponies develop their careers, it stands to reason that a lot of Ponies would focus on getting mentor/apprentice relationships.  Inheriting family businesses would also be a popular custom, as we see with Applebloom.  Higher education appears to be more optional or for specialized fields rather than a commonplace achievement.

Summer song cafe reacts: bunny stampede

Meadow Lark:  ”Mom, stop trying to cuddle the stampede!”

Merri:  ”Never!”