Voiced by Jim KrennThe Flesh: He's super strong and super naked!
- The Big Guy: The muscle of the group.
- Catch-Phrase: "Ouchies" whenever he suffers from Amusing Injuries.
- Dumb Blonde: A male example. The least intelligent member of the team.
- The Hero: Probably. He's mentioned first in the theme song.
- Innocent Fanservice Guy: A naked muscleman who's evidently just too dumb to know any better.
- Manchild: He's as mature as a 5 year old. Which might explain why he's always naked.
- Naked People Are Funny: He never wears clothes for some reason. Seeing as he's an action figure, he can get away with it.
Voiced by Cris WinterThunder Girl: She flies like thunder!
- Flight: Her Power and the only one apparently.
- Leitmotif: One she sings herself, to a John Williams-esque tune, while flying.Thunder Girl! Flying like thunder! How other people must wonder, what it's like to be me!
- Non-Indicative Name: Despite her name, she doesn't Shock and Awe, though (Granted thunder is simply the loud booming noise that accompanies lightning).
- The Smurfette Principle: The only female lead on the show. Especially with the only other lead being Quokie.
- Women Are Wiser: Of the heroes, she is usually the smartest. Granted this is an extremely low bar and she's definitely not as above her male counterparts as she'd like to believe.
Voiced by Jim KrennStinky Diver: A former naval commando with an attitude as bad as his odor!
- Badass Normal: He has no superpowers, but can still help the team.
- Blood Knight: Sometimes. Certainly more violence-happy than the rest of the League.
- Iconic Item: His spear gun.
Voiced by Scott PaulsenMeltman: With the power to ... melt!
- The Heart: The nicest member of the group, besides maybe Flesh.
- Kaiju: One episode has him become a giant known as Mega Meltman (portrayed by a guy in a Meltman costume).
- Lovable Coward: He's cowardly, but nice.
- Non-Action Guy: Would rather not be doing anything death-defying, strenuous, or even remotely dangerous. He usually ends up being thrown into the action accidentally.
- What Kind of Lame Power Is Heart, Anyway?: He has power to melt which he never uses.
- Catch-Phrase: Tends to say "Blast it" when displeased (which is to say, all the time).
- Da Chief: It's in his name.
- Large Ham: His volume switch seems to consist of "loud" and "louder".
- The Leader: Non-action example; he's the smartest member of the team and the one who sends them out on their missions.
- Mentor Archetype: Kind of parodied. He tries, but they never listen.
- No Indoor Voice: Even at lower volumes, he usually just sounds like he's yelling more quietly.
- Only Sane Man: Saddled with the frustrating task of keeping the team focused and not running around like idiots (well, even more like idiots). It's no wonder he never stops yelling.
- Surrounded by Idiots: See Only Sane man above.
- Token Minority: Essentially subverted. The Chief is the only recurring African-American character on the show but nothing is ever made of it.
Bill the Lab Guy
- Catch-Phrase: Two."There's nothing I can do" and "Oh no, I was afraid of this.".
- Dull Surprise: Always speaks in a dead monotone.
- Team Pet: The league's faithful dog.
Voiced by Jim KrennThe main antagonist of the show.
- Archnemesis: To The Action League and he is the most recurring antagonist.
- Big Bad: The most frequent villain in the show.
- Catch-Phrase: "Uh oh, here's trouble." whenever something goes wrong.
- Corrupt Politician: He's the mayor and a villain.
- Evil Sounds Raspy: He speaks in a hushed and hoarse voice.
- Faux Affably Evil: When interacting with the heroes, he always addresses them with mock politeness.
- Laughably Evil: Given what kind of show this is, it's not surprising.
- Mayor Pain: Of both the "Evil" and "Incompetent" varieties.
- No Celebrities Were Harmed: He is given the same voice that the WDVE crew gave to then-mayor of Pittsburgh, Tom Murphy.
Big BabyA baby doll who makes havoc on its way until tamed.
- Attack of the 50-Foot Whatever: He is two-feet tall, which is tall compared with other toys.
- Creepy Doll: He cries in a creepy tone and leaves devastation in his way when not satisfied.
- Hulk Speak: He speaks in third person with an adult male voice, as in "BABY MAD!"
- Sealed Evil in a Can: Big Baby was in a toybox in the basement until the KISS concert accidentally woke him up in the episode Rock-a-Big-Baby.
Voiced by Jim Krenn
- Create Your Own Villain: Was the Action League's accountant, but became the freak he is now thanks to the incompetence of the Flesh & Bill the Lab Guy.