Badass Adorable: Less badass looking than Wes, but he's still pretty tough.
Big Brother Instinct: Was instantly ready to protect Jovi from Zook's Shadow Zangoose. Luckily, before he became the victim of a Curb-Stomp Battle (Shadow Zangoose was 27+ while Eevee is still barely 12 at that point), the problem was taken care of for them.
Disappeared Dad: Although, unlike with the protagonists with missing dads in the main series, it's outright stated that he's passed away.
Kid Hero: Though he's supposedly at least 13, given he's identified as "a lone teen" at one point. However, the reporter was probably just guessing.
The Southpaw: Like Wes, wears the portable Snag Machine on his left arm. However, when in battle with wild Pokémon, he throws Poké Balls using his right hand, hinting that he may be ambidexterous.
Vague Age: He's identified as a teen in one transmission, but on the other hand, in link battles he's shorter than the other game protagonists, who are supposed to be around 11 years old. Then again, being older does not necessarily equate to being taller.
Michael's little sister, who helps out with an errand early in the game.
It's All About Me: Pounded into you early in the game. When you go to pick her up from Dr. Kaminko's, Jovi assumes that you've gotten lost (and that you're lying if you deny it) and that she has to lead you home. And later, when you have to go to Gateon Port to pick up part of the purification machine, she claims that she's the one that was sent to do the job and that you're her assistant.
Kidnapped Scientist: Gets abducted by Cipher early in the game. They want him to use his knowledge to help them with their Shadow Pokémon plan. However, he makes it clear that he has zero interest in doing so.
Gameplay and Story Integration: When the characters in the game say that this Pokémon was designed to be impossible to purify, they mean it. The normal purification techniques won't do a thing. The only way to purify it is to make all of Purify Chamber's nine Sets reach maximum tempo.
Obviously Evil: Unlike "regular" Shadow Pokémon, which are visually indistinguishable from normal Pokémon aside from a dark aura which is invisible to the naked eye, you can tell this one's corrupted just by looking at it.
His ultimate goal is to become Governor of Orre through Cipher's schemes. Also, he's the Straw Loser for the Cipher Admins. His strategy in battle goes from attrition damage from Shadow Sky to spamming Explosion.
Browsix: He's the aversion. His color only relates to his Ground-Type Shadow Baltoy. After he loses it, he gets a Vigoroth, becoming a Normal-Type specialist, which is normally associated with light gray or white.
The Ditz: All of them. They're so incompetent, they can't even count how many of them there are. They all had the brilliant idea to disguise themselves as six identical copies of Justy, a well-known figure in Phenac that everyone knows there is only one of. At least they managed to get their sound-off right this time.
Elite Mooks: They are more powerful than the other Cipher Peons you fight in the area, and they actually remember to Level Grind.
Verbal Tic: Greesix can't go two sentences without saying "sixfold". It also spilled into his Pokémon team, having six Pokémon during your first battle with him. Oddly, he never replaces his Shadow Seedot.
A minor member of Cipher with a big mouth, bad temper, and abilities to prove it.
Perpetual Frowner: For the most part, it's just a frown, but he also has a really pissed-off glare.
Screw This, I'm Outta Here!: After he loses to Michael twice, he wisely decides to just run for it, away from Cipher in general and to escape Gorigan's punishment.
Would Hurt a Child: Well, he was certainly willing to attack a little girl with his Shadow Zangoose, and Michael standing in the way was even better by his own admission.
An eccentric scientist who lives in the middle of a dark forest. Most of his inventions are either useless (i.e. the Poké Pole), harmful (i.e. the Unhealthy Sandals), or just plain stupid (i.e. The Power-Draining Lightbulb).
Berserk Button: When one of his inventions doesn't work as intended. (He's well aware that they have no practical use, though.)
Chekhov's Gun: His scrapped Robo Kyogre invention, which Michael later uses to reach Citadark Isle, making it one Kaminko's few inventions that's actually useful.
Karma Houdini: In the postgame, it turns out that Dr. Kaminko never actually intended for his troublemaking inventions to be put on the public market - that was something Chobin did behind his back. The Doctor is enraged once he figures this out. But since Chobin is out at the Orre Colosseum by this point, we never see him punished.
Ardos is one of Mr Verich's two bodyguards. He is first met at Gateon Port, where he curbstomps Zook with his level 44 Alakazam. At the end of the game he is revealed one of Greevil's sons. He goes Laughing Mad after Greevil's defeat and claims he'll restart the evil organization.
Eldes is Mr. Verich's other bodyguard. Just like Ardos, he's one of Greevil's sons. However, unlike Ardos, he's not too enthusiastic about the whole "Cipher" thing. After Greevil's defeat, he pulls a Heel-Face Turn and convinces Greevil to give up.