One possible theme could be friendship. Shrek is a big, gruff but kind - hearted ogre, and Barry could be a character that forms an unlikely friendship with him. They might go on adventures together and learn from each other.
Yes, there might be some 'Shrek x Barry Bee' fanfiction out there. You can try searching on fanfiction websites. However, it's not a very common pairing, so it might take some time to find.
I'm not sure about specific 'Shrek x Barry fanfic' stories. You could try searching on fanfiction websites like Archive of Our Own or FanFiction.net. There might be some creative works there.
One possible plot could be that Barry Bee somehow gets lost in Shrek's swamp. Shrek, being the gruff but kind-hearted ogre he is, decides to help Barry Bee find his way back home. Along the way, they learn about each other's worlds and develop an unlikely friendship that could be misconstrued as something more by other characters.
One possible plot could be that Barry B Benson, being the curious bee he is, stumbles upon the swamp where Shrek lives. He might be initially scared by Shrek's appearance but then realizes they both have a lot in common in terms of being outsiders. They could team up to protect the swamp from some new threat, like an over - zealous developer who wants to turn it into a theme park. Barry could use his flying skills to scout out the enemy's plans while Shrek uses his strength to fend them off.
One idea could be that Shrek and Barry Benson find themselves in a strange new land together. Shrek is used to his swamp and Barry is used to his beehive world. They could start off as strangers but then gradually become friends as they face various challenges like finding food and shelter in this new place. They might use Shrek's strength and Barry's ability to communicate with other insects to their advantage.
Barry B Benson could fit in as a new friend for Donkey. Since Donkey loves to talk, he would be excited to have a bee who can also chatter away. They could have long conversations while Shrek just rolls his eyes in the background. Barry could also be useful in getting honey for Shrek's breakfast, or he could pollinate all the plants in the swamp to make it even more beautiful.
Well, they could start off as reluctant allies. Shrek might not trust Shaggy at first because he seems so skittish, and Shaggy is afraid of Shrek's appearance. But as they face challenges together, like fighting off a common enemy, they begin to respect each other. For example, when a group of witches tries to capture them both for their own evil plans, they have to rely on each other's unique skills. Shrek's brute strength and Shaggy's quick thinking and ability to find hiding places.
There might also be new characters created specifically for the fanfic. These could be hybrids of the two universes or characters that are designed to bridge the gap between Shrek's world and Sonic's world. They could play important roles in the plot, like being the ones who bring Shrek and Sonic together in the first place or being the key to solving the problems that arise during their adventure.
One common theme could be friendship. Since Shrek and Shadow are from different universes, their relationship could be explored in terms of how they become friends. Another might be adventure, as they could go on quests together.