OK, so first off, here's Diesel...

He's a scheming, devious bastard and utter slacker who used to deal with yard work (shunting, mainly) and small deliveries up and down the Other Railway.

A nasty little engine with six undersized wheels, a short, stumpy cab, a short, stumpy body, and a short, stumpy temper - one of the first engines ever designed by British Rail (which explains the horrid clanking noise he's been making since '85).

Unceremonious star and mascot of the Other Railway, a region of British Rail, Britain's former nationalized railway company, before it's privatisation in 1996. After the aforementioned event, the title "Other Railway", which previously belonged to the Mainland railway network, was attached to a that crummy, underfunded private-owned railway in Barrow-in-Furness, officially know as the Barrow Regional Transit. Yeah, so, that's the Other Railway. Where Diesel and his... Colleagues reside.

He hates love, joy, and steamies. Loves a certain diesel railcar from his Playtrain™ magazines.

If the Other Railway can be considered an Anti-Sodor, then the diesels (henceforth "Diesel Depot") are the Anti-Steam Team. So, basically, Diesel is the Anti-Thomas (although one could also consider him to be the Anti-Duck).

He's based on a British Rail Class 08 shunting diesel:

His driver is Twilight Sparkle:

Diesel's most tolerable colleague and drinking mate is Spamcan, A.K.A. D199:

The gruff goods engine of the Other Railway, Spamcan is the all-around macho, working class bugger.

He became such after a humiliation at the buffers of a Sodor steamie (Henry). After coming home, he decided to toughen up, and haven't stopped since - he never shaves or has wash-downs (partly to avoid being confused with Old Stuck-Up (whom he hates with burning proletarian passion), partly because he revels in filth, but mostly to piss off Bowler). Along with Diesel, he has been one of the main power sources of protesters back in the '80s, during the second Thatcher government. He did it for the workers and paupers, Diesel did it for his own political views (anarchism). For both of them, this was a passing phase.

Loves a good scrap, but especially a good scrapping.

You can consider him as the Anti-James of the Anti-Steam Team ("Diesel Depot")

He's based on a British Rail Class 46:

His driver is Apple Jacqueline (A.K.A. Applejack):

The (self-claimed) most important engine of the railway is Sir Alaric English Electric (knighthood bought during the "Cash-for-Honours" scandal, much like his controller's), also know as Old Stuck-Up (number: 40125):

The local Upperclass Twit-of-the-Year for twenty years running (the exact amount of years he hasn't been on time with his trains), Old Stuck-Up is the very definition of narcissism. Pretentious, arrogant, posh beyond any reason (the type of supremacist "modern posh" we see so much in shows parodying politicians, eg: Spitting Image), he's as tolerable as having a large piece of candy wagged in front of your eyes, when you've been starving for months, only to have your heckler lubricate it by pissing all over it, and then jam it up your bumhole.

Loves money, himself, oil, himself, baiting paupers, and himself.

He is the Anti(?)-Gordon - he pulls the express (when and if he wants to)

His driver is Rarity Belle (also known as Rarity Unicorn):

Another well-know figure of the O.R. is Bowler (A.K.A. D4711, A.K.A. D261, A.K.A. "that picky tosser"):

A selfish, hypochondriac neat-freak, Bowler is equal parts posh toff and paranoid twat, caring about nothing more than remaining clean and making sure his colleagues are clean as well (so as not to besmirch him). He's an uppity passenger engine, by the way, second-in-command behind Stuck-Up in the express engine department.

Phobias include germs, dust, smoke, rust, children, the Sewage Train, stamps...

He's the Anti-Henry of the Diesel Depot.

Both him, and Old Stuck-Up are based on British Rail Class 40 diesel-electric engines:

His driver is Beatrix Lulamoon (stagename: The Great and Powerful Trixie):

The engines who comes closest to being Diesel's friend is Derek (formerly: Paxman):

Derek is the white sheep of the Other Railway clan: kind, honest, loyal, generous, cheery and industrious. Pity he's an utter whimp, thanks this horrid motor design. His cooling system is the worst ever to be designer by sober(!), sound human minds. Nevertheless, he keeps up his friendly attitude, always there to show a wheel when he's needed (and when he's not broken down due to overheating). Derek is one of the two bronies among the Other Railway diesels (the other being Bert, see below). Has a loud horn (VERY loud) and a huge nose. I mean, seriously, look at it! It's a freaking beachball with nostrils!

He absolutely loves winter.

Due to his meek, but knowledgeful (is that even a word? Nevermind, it IS now!) nature, he can be seen as the Anti-Percy.

Derek's based on the ill-fated British Rail Class 17 mix-traffic diesel engines:

His driver is Fluttershy, and his fitter is Angel Bunny:

Two actually important (and actually useful) members of the Other Railway are Pip (Philippa) and Emma:

(the image belongs to of Train4755 from DeviantArt - all rights reserved)

Pip and Emma are twin InterCity 125 units, together (and with a few coaches) they form a full InterCity set. They are invaluable members of the Other Railway, as their rapid commuter trains are the only ones that are actually on time, and provide a decent service. Pip, the leader, is the more serious, sensible one, while Emma is the cutesy-poo, ditzy one. Their former controller (Sir Wyatt Fronts, A.K.A. the Thin Git) acquired them from a nearby mall to avoid a "Sexism in workplace" lawsuit from the local council (he calls them Candy and Sugar). Being the only female engines on the railway, they had held their own, and proven to be more than capable of standing up for themselves (and the railway, for that matter).

They're twins, but it's easy to tell them apart: Emma wears red lipstick, while Pip has blue eyeshadows put on (not visible on their picture)

Given their welsh(ish) accent and earnest, but still feminine nature, they can be considered as the Anti-Donald and Anti-Douglas.

They're both based on British Rail Class 43-II express diesel engines, the fastest diesels in the world:

Their drivers are Cloudchaser and Flitter:

A haunting nightmare common visitor and now resident of the railway is Steamie:

No image available!

Steamie is, what his name describes him: a fluorescent green tank engine with six, white-rimmed small wheels, a short, stumpy cab, a short, stumpy boiler, a short stumpy funnel, and a short, stumpy cock.

He's a cheery, sickeningly sweet engine who never ceases to smile - ever. Originally brought to the railway to learn (as part of a deal the Thin Git made with the local workshops), he was taught a hard lesson about life by his unceremonious mentor, Diesel (who else?). Unfortunately, this turned him into a bipolar, giggling, scheming little lunatic - his mental condition have been declining ever since, and by now, he lives in an almost constant, near-psychotic level of euphoria.

Loves sharks - they have such BIIIIIIG smiles! :)

He can be considered the Anti-Diesel, given his nature and the fact that he's a steam engine, but he's usually filed as being the "Anti-Duck".

He's based on a Hunslet Austerity 0-6-0ST saddle tank locomotive:

(this is also the most accurate representation of his description)

His driver and fireman (firemare) is (for the moment) Pinkamena Diane Pie (also known as Pinkie Pie):

'Arry & Bert are also known (notorious) members of the gang:

Two thuggish diesel shunters, usually found working in scrapyards, quarries, harbours, foundries, building sites, the Smelters, or in the yards, under Diesel's command. What can be said about them? 'Arry is the more aggressive, Bert is the more stupid. Both are incredibly thick and have a distinct dark humor that unnerves just about anyone. Twins, much like Pip and Emma, and thus, stick together.

Their full names: Iron 'Arry and Iron Bert - don't ask me why their names are in the Hungarian/Japanese name order.

Their family motto: Swots and steamies spoil schemies.

They are basically the Anti-Bill and Anti-Ben of the Diesel Depot, coming up second behind Pip and Emma in the role of the Anti-Donald and Anti-Douglas (of course, they are courteous enough to let the ladies forward - they later explained).

Like Diesel, they're also based on British Rail Class 08 shunters (albeit less boxy than Diesel).

Their (for the moment) lone driver and fitter in one person is Rainbow Dash:

Cromwell is another engine who's image we don't have, only his basis' (well, his basis' model's):

Built on a drunken whim, Cromwell is surprisingly reliable gas-turbine express engine, who's his unusual appearance brought big dough for the Thin Git. He's aloof, standoffish and slightly neurotic, with large, round, ugly glasses. His tende (named Mr. Bottomsly) has a human-head sized cast-iron top hat welded to it's... Top, and has a mind of it's own (and less control over his bowels than a cow after nibbling on expired laxatives) - he's apparently quite the ladies man. Somehow. Used to be a sleeper agent that tried to return Cromwell to Sodor, from where 'Arry & Bert have rescued him.

Cromwell is an expert at pranks; His speciality is the evergreen "Pull my buffer" trick.

He's Anti-Oliver of the Diesel Depot, considering the nature of his acquirement.

Based on the experimental GT3 gas-turbine locomotive.

He has no secure driver at this point.

BoZo is another weird one:

(a brilliant illustration by TheAusterityEngine from DeviantArt - and also the only one)

An unique model in locomotive design or a horrible abomination of enginekind - BoZo is either and neither. An usual steam-diesel hybrid, he does his best despite the shabby engineership done on him. Aged, but not old, loud, and enjoys it. He has more holes than a WAG's head, The only steamie (of sorts) ever to receive the respect of the whole Other Railway.

He is the Anti-BoCo.

Based on the Kitson-Still steam-diesel locomotive:

His unofficial driver is Spike (fitter of all the Other Railway engines):

CoBo is also mentionable:

(he's the middle one in the background, partially behind the tree)

A misanthropic, near-emotionless, asocial works diesel, CoBo does his job silently and diligently. Used to be the local bully to the rest of the Other Railway diesels during the British Rail era, now serves as the main workforce and source of income, as he's the only one who has decent work standards (besides Pip and Emma) on the entire railway. He prefers to stay in the background until he has another reason to do so.

Actually, I thin he's the Anti-Duck, as he cares for his work, but has little to no social skills.

Based on the British Rail Class 29 diesels:

His driver is Gilda:

And finally, the Breakfather:

No image available!

Once the head honcho of the Other Railway clan, he met his ultimate demise at the oil refinery, when his driver took that exact moment to take up his habit of smoking. One explosion and a hasty rebuilt later, he found himself turned into a rickety brakevan, and has since then served as a conduit between the engines and the trucks. Before coming to Equestria, 'Arry and Bert supplied him with a 18-cylinder two-stroke diesel engine, "donated" from a Russian echange diesel ("Wha'?! 'E alre'y 'ad thee o' 'em!"). Nowadays, he takes it easy, pulling local goods trains while the more capable Spamcan takes care of the long distance runs.

In his mind, he's still the undisputed Don of the Yard. In everybody else's he's a senile old dingbat.

He's the Anti-Edward.

He's based on a British Rail Class 21 diesel engine, used for goods (his class brothers and sisters were used mainly for passengers):

And, well, that's all...

No, wait...

Dr. Whooves is the stationmaster, Derpy is his assistant. Celestia is the Chairman (Chairmare) of the railway, Luna is the Director, and my OC Alexei is the Controller. That's all.