In the fanfiction, Naruto might prank the Anbu by replacing their normal kunai with ones that make really loud and embarrassing noises when thrown. So when they go to use their weapons in a serious situation, they end up looking foolish as these noisy kunai fly through the air.
One of the pranks Naruto might do is to mess with the Anbu's communication system. He could use his knowledge of chakra and some basic electronics (if we assume some modern - like elements in the fanfiction) to scramble their signals. This would make it difficult for them to coordinate with each other, and they'd be running around trying to figure out what's wrong while Naruto watches from a hiding place, having a great laugh.
In this fanfiction, Naruto might use his shadow clones to create chaos at the Anbu headquarters. He could make it seem like there are intruders everywhere, causing the Anbu to go on high alert and run around in confusion. Maybe he'll also replace some important documents with funny pictures or put whoopee cushions on their chairs.
One common prank could be Naruto switching the Hyuga clan's training dummies' positions. This would mess up their training routine as the Hyuga are very precise in their movements and training. They rely on the familiar layout of the training area, and Naruto's prank would throw them off balance.
In some Naruto fanfiction, Kurama might prank Naruto by making his chakra go haywire at inconvenient times, like during a spar with Sasuke. It could be a harmless prank where Naruto's Rasengan suddenly fizzles out because Kurama messed with the chakra flow just for fun.
Maybe Naruto uses his shadow clone jutsu to create a bunch of clones that keep following Tsunade around, asking her silly questions all day long. This would drive her crazy as she tries to get her work done. For example, they could keep asking her about her love life or her opinions on the latest ninja gadgets.
One interesting scenario could be Harry using a charm to make Snape's potions ingredients misbehave during class. For example, the shrivelfigs start bouncing around the cauldron. Another could be Harry transfiguring Snape's cloak into a bright pink color while he's walking down the corridor. Or perhaps Harry using a spell to make Snape's voice change into a high - pitched squeak when he's trying to give a lecture.
The main character is Naruto for sure. When it comes to the Anbu, there could be some new and original Anbu characters created just for this fanfiction. They could have unique abilities and personalities. Naruto's relationship with these made - up Anbu characters could be really interesting. He might prank them in ways that play off of their individual quirks. For example, if one Anbu is really proud of his speed, Naruto could set up a prank that makes it seem like he's much slower than he thinks.
One interesting storyline could be Sakura joining the Anbu and having to prove herself among the male - dominated group. She might face challenges like secrecy requirements and intense training, all while Naruto is on his own journey, and their paths cross in unexpected ways during missions.
In some fanfics, the 'pranks bashing' might involve the teachers getting fed up with the constant pranks. So, they come up with their own clever ways to stop the students from pranking. Professor McGonagall could use her transfiguration skills to turn all the prank items into harmless objects. This would not only put an end to the chaos but also teach the students a lesson about respect for the school environment.
There are fanfictions where Naruto pranks Konoha by creating illusions all over the village. He makes it seem like there are giant monsters approaching, causing a bit of panic at first. But then he reveals the prank and everyone has a good laugh. Some stories also have him pranking his friends like Sasuke by making it look like he's lost his Sharingan, which Sasuke initially freaks out about until he realizes it's just Naruto being Naruto.