- Complete Monster: Wooster Q. Weasel—better known as the Creeper—is the former king of Animalia, and brings an unprecedented darkness to a series that had otherwise been very lighthearted. Having become drunk on his own power during his tenure as king, and exiled for the safety of Animalia as a whole, the Creeper resolves to take back the power of the Core regardless of the consequences to Animalia. A refined manipulator, the Creeper attempts to start a war in Animalia through Tyrannicus, and after this fails, moves on to tricking his old friend King Livingstone and his young friend by pretending to undergo an epiphany, only to backstab the two and try and have them blown away to their deaths into the Winds of No Return purely out of spite. The series finale sees the Creeper at his nastiest: Upon taking the power of the Core and resuming control of Animalia, the Creeper brainwashes and captures all resistance and ultimately strives to use the knowledge contained within the Corespore to travel to and subject other worlds entirely—at the consequence of killing off everyone in Animalia.
- Creepy Awesome: The Creeper, again. Despite being the nastiest character in the show, fans love him.
- Ensemble Dark Horse: Iggy and Fuschia are both quite popular characters amongst the fans, the first for both his personality and later Character Development, the second because of her Woobie status. The Creeper also qualifies as one, due to being Creepy Awesome.
- Ho Yay: In the final episode, Livingstone explains about how The Creeper "Broke his heart". Also, the whole thing about The Creeper going drunk with power with the command coconut could be seen as sexual if you have a dirty enough mind.
- The Scrappy: Allegra, though she does get Hidden Heart of Gold moments.
- They Wasted a Perfectly Good Plot: the finale episode reveals the Creeper used to be the King of Animalia as well as a friend of Livingstone until he got Drunk with Power and became an outcast. This is only mentioned for a few minutes sadly, and is never really developed.
- Also, the war in Animalia plot could have been an interesting potential story arc, but is instead solved in just one episode. Granted, from the story's perspective, this was a good thing.
- The Woobie: Fuschia, for having to put up with Tyrannicus.
- Alex also has his moments.
YMMV / Animalia