Heh, I don't think Toby was ever named in the series - he was just the fruit bat leading the swarm.
Also, did you purposefully chose a picture of Philomela where she is one day away from reincarnating?
Do we have any actual aquatic environments?
Now, for the list, most of these guys are rather obscure.
* Mulia and Gustave are a pair of chefs - they take part in a cooking competition but are inconsequential to the plot otherwise.
* Matilda is a local donkey. Might be an ally if we need another one, but we don't really know anything about her.
* Cranky was a donkey that refused to befriend Pinky and suffered from her repeated efforts. Matilda turns out to be his lost love.
* Thunderlane is a pegasus - joined Dash in her efforts to join the Wonderbolts. He once went down with feather flu and managed to get half the weather team sick on the eve of an important event.
*Lotus and Aloe are the twins working at the spa
* Royal Guards - they are the kind of guards whose job is to stay motionless for long periods. They don't appear in town unless the princess does.
*Nurse Redheart is one of the hospital staff obviously
* Mrs Harshwhinny and Mrs Peachbottom never even apppear in Ponyvile (one arrives as an inspector to judge if the Crystal Empire is qualified to host the next Equestrian Games and the other is a random tourist who gets mistaken for her)
* Mayor Mare might be an ally. She handles the management of the town, but usually needs Twilight's OCD organisation skills for more complex tasks
* Joe doesn't live in Ponyvile - he has a donut shop in Canterlot
* Lightning Dust might be a blight. - she is like Dash, but with even bigger ego and less empathy - so when they both joined the Wonderbolts academy, she kept putting other cadets in danger with her stunts.
* Jet Set and Upper Crust are a pair of snobs from Canterlot. The only thing they do is look down on others (and rile Rarity up in the process)
* Filthy Rich is a local wealthy businessman, but actually an ok guy. It's his daughter that causes problems
* Flitter and Cloudchaser are background pegasi from the weather team
* Cheerlee is the school teacher. She is single, so last valentines equivalent the CMC tried to set her up with Big Macintosh, with hilarious results.
* Spitfire and Soarin are Wonderbolts, exactly the two you used for a picture
* Hoity Toity is a Karl Lagerfeld expy who visited Rarity's fashion show
* Photo Finish is a fashion photographer who roped Fluttershy into becoming a model
* Saphire Shores is a pop star as far as I remember. She made an order for a dress that exhausted Rarity's supply of gemstones.
* Mr and Mrs Cake are the owner of Sugarcube Corner - Pinkie works for them.
* Fancy Pants is a rich unicorn from Canterlot, possibly an ally. He is charming and friendly despite his position.
* Royalty consists of the three princesses, and I guess they are too powerful to be allies, even Cadence.
* Daring Do is a fictional character from adventure books Dash reads
http://www.youtube.com/watch?v=e3gaaBCx9Dw(my own suggestions for NPC will be in the next post. Wait a couple minutes.)