Maybe the Fairy Tail characters hold a special tournament, and the Total Drama cast gets invited to participate. This would lead to some really fun match - ups. Imagine Chris McLean as the announcer for the tournament. He could add his own brand of chaos and humor to the event. The Total Drama contestants would have to learn magic quickly to compete with the powerful Fairy Tail wizards, and there could be some hilarious training montages.
Another plot could involve a villain from the Total Drama world teaming up with a dark wizard from Fairy Tail. They could create a powerful spell that starts to merge the two worlds in a bad way. The combined group of Total Drama characters and Fairy Tail members would then have to work together to stop this. Along the way, there would be a lot of character development as they learn from each other's strengths and weaknesses.
One idea could be a crossover with another popular animated show. For example, if Total Drama crossed with Adventure Time, Finn and Jake could end up on the Total Drama island and participate in the challenges. They would bring their own unique skills and humor to the mix, like Finn's sword - fighting abilities and Jake's shape - shifting. Another plot could involve characters from Total Drama being transported to a different fictional world, like the wizarding world of Harry Potter. They would have to adapt to new rules and use their wits to survive. Maybe Heather would try to use magic to her advantage in the Triwizard Tournament.
A cool plot might involve Gaara being a long - lost relative of a Fairy Tail member. Maybe his family had some connection to the guild in the past. As he tries to figure out this connection, he gets involved in a big adventure to save the guild from a powerful wizard who wants to destroy it. He could use his sand skills in ways that surprise the Fairy Tail wizards and they could teach him about their magic in return.
One idea could be that the characters from Fairy Tail and Magi team up to defeat a common, extremely powerful dark magic user. The mages from Fairy Tail could use their unique magic skills like Natsu's fire magic, while the Magi characters could utilize their dungeon - conquering abilities and djinn powers. For example, Alibaba could use Amon's power in combination with Gray's ice - make magic to create some really cool and powerful attacks.
One idea could be that the Avengers end up in the Fairy Tail world. They team up with Natsu and his friends to fight a common enemy, like a powerful dark wizard who has somehow acquired some of Loki's magic. This would lead to some really cool battles, with Iron Man's tech mixing with Fairy Tail's magic.
One idea could be that the characters from Fairy Tail end up in the Twilight world. Natsu could accidentally set a forest on fire in Forks while trying to show off his magic, causing chaos among the vampires and werewolves. Another could be that the Twilight vampires are intrigued by the magic in Fairy Tail and seek to learn it. Maybe Edward could befriend Lucy, seeing her celestial spirit magic as something unique and different from his own abilities.
One idea could be that Ichigo from Bleach somehow ends up in the Fairy Tail world. He could join forces with Natsu and the gang to fight a common enemy. Maybe an Arrancar has escaped to the Fairy Tail universe and is causing chaos, and Ichigo's skills as a Soul Reaper are needed to stop it.
One idea could be that the Fairy Tail guild members get transported to the world of RWBY. They could team up with the RWBY teams to fight against a common enemy like a powerful new Grimm that is resistant to normal attacks. The mages from Fairy Tail could introduce their unique magic to the RWBY characters, like Natsu's fire magic which could be useful in burning through Grimm hordes.
Maybe there could be a plot where a powerful villain from the Naruto universe, like Orochimaru, teams up with a dark mage from Fairy Tail. The combined threat forces the heroes from both worlds to work together. The Fairy Tail members would be amazed by the unique abilities of the ninja, like Sasuke's Sharingan and its various powers. In turn, the Naruto characters would be intrigued by the wide array of magic in Fairy Tail, such as Erza's Re - Quip magic.
One idea could be Natsu crossing over into a modern-day world. He'd be confused by all the technology but use his magic in unexpected ways, like using fire magic to power up electrical devices. Another could be a crossover with a different anime world where Natsu has to team up with new characters to fight a common enemy. For example, in a world full of mecha, he might use his fire to overheat the enemy mechas.
Itachi could be reincarnated in the Fairy Tail world. He retains his memories and skills from his previous life. In this new world, he tries to understand the concept of magic which is so different from chakra. He gets involved with the Fairy Tail guild when they are wrongly accused of a crime. Using his intelligence and combat skills, he helps them clear their name and in the process, forms strong bonds with the guild members.