Warning: Spoilers Off applies to Moments pages.
- Prince Bowser Koopa. Fullstop. He is only nine years old, yet he is a full blown sociopath. He has a very concerning superiority complex and sees everyone, including his own family, as a slave. Everything seems to be a game for him, and often uses his toys to stage executions for very minor "infractions". It seems that he also can abuse his authority to get what he wants, no matter how messed up it seems. He gives degrading nicknames to his siblings, treats Wendy in a very sexist way, and often harms others, ranging from elderly citizens to little children, for no reason other than because he thinks it's fun. It says something when even the members of The Shadows are horrified by his behaviour. Did we also mention that this is the future heir of the Koopa Kingdom once Bowser passes away?
- Bowser Jr. is this way as a result of both Bowser spoiling him rotten all his life and his biological mother, Karen, being an entitled woman who believes she is superior to everyone. Junior is fully aware of this, and takes advantage of the fact that Bowser is Super Gullible when it comes to him and pretends to be a kind-hearted child in front of Bowser so he will favour him over the Koopalings. Bowser Jr. has shown numerous times that he is not grateful to Bowser for any of what he has and that he would backstab him in a heartbeat if the opportunity ever arose.
- A Bad Future shows that if Bowser Jr. were to become the king, he would pretty much turn it into a dictatorship, having many people executed for minor offenses and even giving green light to a plan that would have ended the lifes of thousands of people. Thankfully though, as seen in "Time Travel Trouble II" it seems Bowser's reign will last until the early 2070s and Bowser Jr. will become king at a very old age, where he is practically incapable of doing any major harm to the Kingdom.
- Tyson Koopa. Bowser's second cousin and someone who is obssesed with claiming the throne throught any means necesary, regardless of the means used and the people he has to get rid of in the process of doing so. It's bad enough that he tries to get a family member killed in order to satisfy his hunger for power, but that he partially succeded and got to rule the Koopa Kingdom for three years, turning it into a living hellhole all while stating that Bowser was unfit to be a king. Even after being arrested for orchestrating the assasination of the legitimate heir of the kingdom, and being stripped of all royal titles he had, Tyson still feels entitled to become the king of the Koopa Kingdom and now he has escaped prison He's out there somewhere, plotting revenge against Bowser.
- ‘’The Return To The Parallel Universe’’ has Tyson’s grand return as he teams up with his parallel counterpart. to get the throne only to push him into the lava when he realizes that there’s only room for one king. Luckily this time he gets arrested into a more secure prison.
- The Criminal Organization known as The Shadows is a huge source of Paranoia Fuel.
- Barring the organization's name, it imposes a huge threat to the Koopa Kingdom, as their two main objectives are erradicating the Koopa Family, thus ending the monarchy, and stealing seven powerful artifacts known as The Seven Stars, which allow the user to use different abilities depending on the star. Other than that, almost nothing else is known about The Shadows.
- You know this organization means business when the four assasins that Tyson hired to get Bowser killed back in 1996 and 1999 are back and are looking for vengance against Bowser, as they blame him for their imprisonment. Mouser, Triclyde, Clawgrip and... who was the guy on fire again? Well, the thing is that the four of them are thirsty for Bowser's Blood and they won't rest until him and his family are all dead.
- Just who exactly is the head of The Shadows and what are their true and/or personal intentions is a complete mystery, as whenever the leader seems to have been exposed, there always seems to be a Greater-Scope Villain lurking among the other bad guys.
- As of now, it seems that the current leader of the Shadows seems to be a Koopa named Edgar who we currently know nothing about expect that it was him that hired Wart and that’s it. Just how long have the Shadows existed?
- Any of the Halloween Episodes. Sure none of them are canon, but it still doesn't change the fact that we are seeing people being slaughtered by psychopaths, monsters, zombies and whatnot.
- Both King Johann XVIII and Fawful are some of the darkest villains in the show so far as they both plan to use the Green Star to kill a massive amount of people so they can make a new empire with more noble people. It gets worse as it’s later revealed that Johann killed both his wife and four of his children to ensure that everything runs smoothly. And if you dare question their plan, they will try to kill you even if you’re the king’s son. And while Johann is defeated for good, Fawful escapes to plot again.
- ‘’Bowser Jr’s Journey’’ has Junior get abducted by a old Koopa named Drake Francis who coaxes him into going to his house (Which is already creepy.) under the promise of shooting things and then it’s revealed that Duke not only wants revenge for Bowser killing Johann but he’s also with the Shadows. Unfortunately, Junior gets pissed when Duke reveals he has no blasters and burns his house down and angrily yells for the Kooplings. (Which provides the image of the main page.) it’s all capped off with Junior giving the Kooplings a massive speech about how he was left alone even though Junior was the one who ran off.
