In a crossover fanfiction, the Mass Effect technology could be introduced to the My Hero Academia world. The students might get access to omni - tools and use them in combination with their quirks. For instance, Bakugo could use an omni - tool to enhance the explosive power of his quirk, leading to some really epic battles against villains who also get their hands on this new technology.
A possible plot is that the Reapers from Mass Effect start invading the world of My Hero Academia. The heroes would have to use their quirks in new and creative ways to fight off these giant mechanical threats. Maybe All Might could inspire the Mass Effect heroes with his unwavering spirit, while Shepard could teach the My Hero Academia characters about advanced military tactics.
Deku and Shepard would be an interesting pairing. Deku is a young hero - in - training with a lot to learn, and Shepard is an experienced leader. Shepard could mentor Deku, and Deku could show Shepard the power of having a quirk. Their different backgrounds and skills would make for great character development.
One idea could be having the XCOM soldiers use their combat skills in the Mass Effect universe. Maybe they are sent to help fight against the Reapers. They could introduce their unique tactics and weaponry to the Mass Effect races.
One idea could be the integration of the mobile suit technology from Gundam into the Mass Effect universe. For example, Shepard's team could discover a lost Gundam unit and try to figure out how to use it against the Reapers. Maybe the advanced beam weaponry of the Gundam could be a game - changer in the fight.
A possible plot is that a Mass Effect technology is introduced to the Naruto universe. Maybe a Mass Relay is found in the Hidden Leaf Village. This could lead to a whole new set of adventures as the ninja try to figure out what this strange technology is and how it can be used. Or, characters from both universes could be combined. Like a Turian with Sharingan abilities.
One possible plot could be Lara Croft discovers a Prothean artifact during one of her adventures. This artifact has a connection to the Mass Effect universe, perhaps it contains data about the Reapers. She teams up with Commander Shepard to figure out how to use this information to stop the Reapers or some other threat that is starting to cross over from the Mass Effect universe into her world.
One interesting plot twist could be the combination of Stargate's wormhole technology with Mass Effect's mass relays. Imagine if the two were somehow integrated, allowing for new travel routes across galaxies. Another could be characters from the two universes swapping abilities. For example, a Mass Effect character getting access to Stargate's Ancient technology and using it in unexpected ways.
Another plot could involve a shared enemy that exists in both universes. The combined forces of Mass Effect races and Destiny Guardians have to figure out how to defeat this enemy. They would need to overcome their differences in culture and combat styles to be successful.
One interesting plot twist could be the combination of Mass Effect's biotics with Warhammer's psychic powers. Imagine a character who has both and has to learn to control this new, extremely powerful force. It could lead to a situation where they are feared and hunted by both sides of the crossover world.
Well, it could be about Ben using his alien forms to fight alongside the Mass Effect characters against a common enemy like the Reapers. Maybe his Four Arms form could be used for brute strength in hand - to - hand combat with the husks.
A great Mass Effect crossover fanfiction idea could be a crossover with the Stargate universe. The Mass Effect races could discover the Stargate network and start exploring other galaxies through it. There could be conflicts and alliances with the various races in the Stargate universe. Also, a crossover with the Dragon Age series might be interesting. The mages and warriors of Dragon Age could interact with the biotics and soldiers of Mass Effect. They could learn from each other's magic and technology, and perhaps even fight together against a dark force that threatens both universes.