Well, Plagg might initially be shocked to discover Hawkmoth's Miraculous. He could try to figure out a way to take it away and keep it from being misused. Maybe he'd hide it in a really strange place only he knows about.
In some fanfictions, Hawkmoths could be defeated by the combined powers of Ladybug and Chat Noir reaching a new level. Maybe they discover a hidden aspect of their Miraculous that gives them an edge, like a super - charged special attack.
A creative way could be through the power of friendship. In the fanfic world, the bond between Ladybug and Chat Noir and their friends could become so strong that it creates a positive energy field that weakens Hawkmoths. It's like the power of love and friendship in some magical stories that overcomes the evil force.
Perhaps Plagg cries because he feels guilty. He might have made a mistake, like accidentally revealing something to the wrong person about the Miraculous powers or secrets. This guilt could be overwhelming for him. Also, it could be that he's sad about the state of the world in the Miraculous Ladybug universe. There are so many akumas and problems, and he might feel powerless to really change things in a big way.
First, describe his physical appearance when crying. Say something like 'Plagg's big green eyes were filled with tears, his little body shaking as he sobbed.' Then, show his internal thoughts. For example, 'Plagg thought about how alone he felt, even with his chosen wielder, in this big, dangerous world.'
There's a possibility that Plagg meets a new character created specifically for this fanfiction. This character could be an ally or an enemy. If it's an ally, they could work together to take down Hawkmoth. If it's an enemy, Plagg would have to fight on two fronts, against the new foe and Hawkmoth at the same time.
Well, if Plagg gets akumatized in fanfiction, it could lead to some really chaotic situations. Plagg's powers are already quite strong as a kwami, and with the akuma's influence, they might become uncontrollable. For example, his cataclysm power could be misused on a large scale, causing destruction all over Paris. Maybe he would turn against Adrien and the other heroes, creating a big rift in their relationships and making it extremely difficult for them to fight back.
Once upon a time, in the deep blue sea, there was a miraculous mermaid named Marina. She had a special power - the ability to heal any wound with a touch of her pearl - like scales. One day, a human sailor named Leo fell overboard during a storm. Marina found him and used her power to save his life. Leo was amazed by her beauty and kindness. He visited the sea often after that, and they became friends. Their friendship grew into love, but they knew there were many obstacles. Marina couldn't stay on land for long, and Leo couldn't live in the sea. However, with the power of their miraculous bond, they found a way to be together. They discovered an ancient magic that allowed Marina to transform into a human for short periods, and Leo learned to swim and hold his breath for longer. Their love story became a legend in both the human and mermaid worlds.
The characters' reactions would be quite complex. Adrien would first be in denial, not wanting to believe that Plagg could be akumatized. Then he would feel a mixture of anger and sadness. He might blame himself for not being able to protect Plagg. Marinette as Ladybug would be focused on the bigger picture. She would try to assess the situation quickly and figure out if there are any weaknesses in the akumatized Plagg's powers. Tikki would be worried too, as she has a relationship with Plagg. She might offer some advice to Ladybug based on her knowledge of kwamis.
The world of 'Miraculous Alix Bunny' fanfiction is full of creativity. Writers can play with the concept of time - travel that the bunny miraculous offers. They might create stories where Alix has to go back in time to fix something in the Miraculous universe. This could lead to her meeting past versions of characters and having to deal with the consequences of changing the past, all while still being in her role as a hero with the bunny miraculous.