In a Beyblade Gingka kidnapped fanfiction, the antagonist could be a blader from a different region who has heard of Gingka's reputation and wants to use his kidnapping as a way to gain power and influence in the beyblade world. This blader might believe that by having Gingka under their control, they can force Gingka's friends to do their bidding. Another potential antagonist could be an old enemy of Gingka's father. Since Gingka is carrying on his father's legacy, this enemy might kidnap Gingka to get revenge on his father through him. Additionally, a mad scientist - type character who is obsessed with beyblade energy could kidnap Gingka to study the unique energy his Pegasus beyblade emits.
It could be Doji. He's always been after powerful beyblades and Gingka's Pegasus is one of the strongest. He might kidnap Gingka to get Pegasus and use its power for his own dark plans. Another option is Ryuga. Although he has his own code, in some fanfictions he could be desperate enough to kidnap Gingka to prove his dominance in the beyblade world. Also, a new and unknown blader who is jealous of Gingka's skills and popularity could be the antagonist and kidnap him to make a name for himself.
One plot idea could be that Gingka is kidnapped by a rival blader who wants to steal his special beyblade techniques. The rival could hold Gingka in an abandoned warehouse and try to force him to reveal his secrets. Another idea is that a group of evil bladers kidnap Gingka to prevent him from competing in an important tournament. His friends then have to search for him and rescue him before the tournament starts. A third plot could be that Gingka is kidnapped by a mysterious figure who believes Gingka has a hidden power within him and wants to harness it for their own evil purposes.
I'm not sure about the 'best' but there are many talented authors. Some authors who have a deep understanding of the characters and write engaging stories are often popular. You can check on fanfiction platforms like FanFiction.net or Archive of Our Own to find authors with high ratings for their Gingka and Madoka fanfictions.
In a fanfiction, Gingka and Madoka having a baby could be portrayed as a new chapter in their relationship. It might show how they adapt to parenthood. Maybe Gingka would be the protective father, teaching the baby about beyblading values like determination and courage, while Madoka would be the nurturing mother, ensuring the baby is well - cared - for.
The plot could involve a tournament where Gingka and Hikaru are on different teams. However, they keep getting drawn to each other. As the tournament progresses, they find themselves having to team up against a common enemy. In the middle of this intense battle, they share a kiss that gives them the power and motivation to win. After that, they decide to explore their relationship further despite the potential challenges from their respective teams.
One possible scenario in this fanfiction could be that Gingka and Madoka start off as friends, gradually realizing their deeper feelings for each other during their beyblade adventures. For example, after a tough battle where Gingka is injured, Madoka takes care of him and they share a tender moment that makes them both aware of their love.
One possible fanfiction could be about Gingka and Madoka going on an adventure together to find a rare and powerful beyblade part. Along the way, they face various challenges and have to rely on each other's skills. Gingka uses his beyblade battling expertise, while Madoka uses her technical knowledge to repair their beys when needed.
It could be a new vampire who is jealous of Edward's relationship with Bella. This vampire might be from a far - off place and has heard about the Cullens and Bella. They decide to kidnap Bella to make Edward suffer. Another possible antagonist could be a human who has a grudge against the Cullens. Since Bella is associated with them, they target her. For example, a human whose family was attacked by a vampire in the past and blames the Cullens for not preventing it. They think that by kidnapping Bella, they can get back at the Cullens.
Perhaps an escaped convict who has a grudge against the Reagan family in general and sees Jamie as an easy target. This convict might be looking to use Jamie as a bargaining chip to get out of the country or something similar.
It could be a rival movie studio. They see Tom Holland as a threat to their own leading actors. So, they arrange for his kidnapping to disrupt his career and the production of his movies. Also, it could be a criminal gang that randomly targets celebrities for ransom. Tom Holland just happens to be their next victim. They don't care about his fame, just the money they can get from his kidnapping.
A rogue shinobi who has a personal vendetta against Sakura or her friends. Maybe this shinobi blames Sakura for something that happened in the past and decides to kidnap her as revenge. He could be a powerful and unpredictable antagonist.