Beware My Stinger Tail: Tails' namesakes are quite versatile in this story and form the center of his combat abilities.
Big Eater: Taken to Running Gag levels as he regularly stuffs himself whenever he can shovel food into his mouth. Carth Onasi lampshades this when he asks, "Were you chronically starved on your planet?!?"
Break the Cutie: Tails begins to suffer this as he experiences the death and destruction around him.
Can't Catch Up: How Tails compares himself to his friends and allies back on Mobius, much to his frustration. It's what lead him to install the cybernetic augmentations in his body
Cartoony Tail: Two of them, of course. In this story, now that he's a teenager, they've grown to twice the length of his own body. (the page image doesn't quite capture that...)
Chick Magnet: Chapter 005 describes in great detail what adolescence has done to Tails' body. While still short and wiry by Human standards, Tails is now much taller and more muscular than before. Think 'highly athletic teenager' and you're on the right track. Tails gets hit on by multiple characters, much to his confusion and embarrassment.
Hammerspace: Used and discussed by Tails, much to Carth's bewilderment. Tails basically carries a portable pocket dimension in his tails, and he even calls itHyperspace Inventory! Carth Onasi eventually dubs it "tailspace".
Heli Critter: Of course. In here, Tails has two flight modes: his general-purpose 'helicopter mode' that has great versatility and a top speed of about 200 MPH, and a much faster and energy-intensive 'turbofan mode' (similar to a jet engine) that can propel him up to 600 MPH or higher.
Power Creep, Power Seep: Tails is much stronger and tougher here than is implied in the games or other media he regularly features in.
Scars Are Forever: Tails' body is a circuit board of old bullet wounds and lacerations, and he knows them all by "date, opponent, and serial number". To him, his scars are much like the medals pinned to a soldier's uniform. Unlike Sonic, who can perform suicidally stupid stunts and escape mostly unscathed, Tails has to work for his heroism.
Schedule Slip: While there was never any regular schedule (it started out weekly and rapidly degraded from there), the author went from February 2011 to April 2013 without an update because of real-life woes.
Wake-Up Call Boss: The rakghoul swarm of Chapter 029. Tails gets absolutely shredded.
What Measure Is a Mook?: After meeting Sarna, a junior officer with the Sith, Tails ponders the nature of this trope if he had to face her in battle. He even notes how, in her Sith armor, Sarna would be just another faceless mook and completely dehumanized.