You can try fanfiction websites like FanFiction.net or Archive of Our Own (AO3). They usually have a wide variety of fanfictions, including those related to Highschool DxD and the multiverse concept.
Well, in some fanfictions, they could travel to a multiverse where the rules of the Highschool DxD world are completely different. For example, the devils, angels, and fallen angels might have different hierarchies or abilities. This can lead to really exciting plot twists as the characters have to adapt to these new environments and find a way to get back to their own universe.
In Highschool DxD multiverse fanfiction, character development can take on new dimensions. New relationships can be formed between characters from different universes. This can lead to some really creative storylines. For instance, a character from a more peaceful universe might have to team up with a battle - hardened character from another universe, and they learn from each other's experiences.
Another popular theme is alternate relationships. The multiverse allows for different pairings between characters that might not be possible in the original story. It gives a fresh perspective on the characters' personalities and how they interact with others.
One interesting story could be where the main character discovers a mysterious watch that gives him unique powers within the Highschool DxD universe. This watch might allow him to control time in battles or gain insights into the hidden secrets of the different factions.
You can start by looking on popular fanfiction websites like Fanfiction.net or Archive of Our Own. Use the search function and type in 'Highschool DxD watches'. This will bring up a list of relevant stories.
The plot could be affected in a number of ways. If the character gets inspired by the Naruto fanfiction, they might start to train differently. For example, if they see how Naruto characters train hard to master their skills, they could apply the same dedication in Highschool DxD's setting, which might lead to them achieving new powers faster and changing the power balance in the story.
Well, it could be really interesting. The character from Highschool DxD might find the concepts in Naruto fanfiction very strange or inspiring. For example, if Issei from Highschool DxD reads Naruto fanfiction, he might be intrigued by the ninja techniques and different power systems. He could potentially even try to incorporate some of those ideas into his own battles or ways of thinking.
You can try looking on popular fanfiction websites like Fanfiction.net or Archive of Our Own (AO3). They usually have a wide variety of fanfictions, and there's a good chance you'll find some related to Highschool DxD watching Death Battle fanfiction there.
One interesting story could be where the characters from Highschool DxD are really intrigued by the unique battle scenarios in Death Battle fanfiction. They might comment on the creative ways characters are pitted against each other, like how they'd compare their own powers to those in the fanfictions.