How about a character created from the fusion of Cell and a Kai? This new being would have the power of a Kai and Cell's evil nature. It could possess god - like powers and a completely different set of abilities compared to the regular DBZ characters. This would be a very unique and powerful addition to the 'dbz cell crossover fanfiction'.
Well, an interesting new character could be a hybrid of Cell and Android 18. This character could have Cell's strength and Android 18's unique fighting style. It would be a really cool addition to the story as it would bring a new dynamic to the battles.
Definitely Superman. Superman's super strength and Gohan's Saiyan power would make for an interesting combination. They could have a friendly sparring match to test their limits. Another good character could be Ichigo from Bleach. Ichigo's sword - fighting skills combined with Gohan's martial arts and ki blasts would create some epic battle scenes.
A heroic knight from a medieval - themed anime. He could be transported to the Highschool DxD world and, due to his chivalrous nature, attract the female characters. He might initially be at odds with the devils but eventually form a bond with the main character and become part of the harem as he adapts to the new world.
One potential crossover character could be Harry Potter. Imagine Naruto, with his immortality, meeting Harry in the wizarding world. Naruto could teach Harry some ninja skills, and they could fight together against Voldemort. Another could be Superman. The contrast between Superman's superpowers and Naruto's ninja skills, along with Naruto's immortality, would make for an interesting story.
Maybe Naruto from Naruto could be a crossover character. His ninja skills and Ichigo's combat abilities could create some unique fight scenes. Also, their different ideologies about friendship and power could lead to some great character interactions.
Solid Snake is an obvious choice. Since they are from the same general franchise, their encounter could be filled with a lot of drama and action. They could have different views on how to handle certain situations, which would create great story tension.
Perhaps they run into a group of steampunk inventors. These inventors would be fascinated by the llamas' hats, seeing them as a new form of headgear with potential technological applications. They might try to modify the hats, which could lead to all sorts of comical and unexpected results for the llamas.
A character with the power of wind could be added. This character could help Sharkboy and Lavagirl in their adventures by providing fast transportation or creating powerful gusts to fend off enemies. For example, when they are facing a horde of flying creatures, the wind - powered character could blow them away.
One potential character could be Naruto from the Naruto series. His ninja skills and strong will could create an interesting dynamic with 'godlike gon'. Another could be Goku from Dragon Ball. The comparison of their power levels and fighting styles would be really cool. Also, maybe Light Yagami from Death Note. The clash between 'godlike gon's sense of justice and Light's more morally ambiguous actions would make for an exciting story.
Rukia could be one of the characters. Since she has a deep connection with Ichigo already in the original series, it would be easy to develop a more romantic aspect in the harem setting. Orihime is also a likely candidate, as she has strong feelings for Ichigo. And from other animes, a character like Saber from 'Fate/stay night' could be interesting. Her noble and powerful nature would contrast with Ichigo's more rough - around - the - edges personality.
Well, obviously Lucy from Fairy Tail would be a likely candidate. She already has a strong connection with Natsu in the original series. Then from the world of Bleach, Rukia could be an interesting addition. Her cool and collected nature would contrast with Natsu's hot - headedness, and her Soul Reaper powers would add an interesting dynamic to the harem. Also, from Attack on Titan, Mikasa could be in the harem. Her strong combat skills and protective nature towards Eren could translate into a similar protectiveness towards Natsu in the fanfiction.