One idea could be a story where the male reader is a trainer who discovers a female Lucario in the wild. They form an instant bond and start a journey together, facing various challenges in battles and in understanding each other's emotions.
A 'female yautja x male reader fanfic' often explores an interesting relationship dynamic. It could involve the male character being thrust into the world of the yautja, perhaps on a planet where they co - exist. The female yautja might be a warrior or hunter, and their relationship could start from a point of curiosity or a shared goal. For example, they might team up to fight a common enemy, and during this process, feelings start to develop. It's a great way to blend the alien and human cultures in a fictional setting.
One great source could be Archive of Our Own (AO3). There are numerous well - written male reader x female reader fanfictions there. You can search by tags like 'romance' or 'adventure' within the male reader x female reader category to find stories that suit your taste.
A lesser - known but interesting one is 'A New Beginning with Female Mewtwo'. Here, the male reader is from a small village. The female Mewtwo arrives there, injured. The male reader takes it upon himself to nurse her back to health. This leads to a series of events where they become close friends and face various challenges together in a world that doesn't always accept their relationship.
One great fanfiction in this category could be 'The Encounter with the Female Grimm'. It has an interesting plot where the male reader character stumbles upon a unique female Grimm. The story is filled with action and adventure as they interact in a post - apocalyptic RWBY world.
Self - discovery is another theme. The male reader may change and grow through his interactions with the female character. He might discover new aspects of his personality or find a new purpose in life because of her.
You can try looking on fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. AO3 has a wide range of fanfictions, and you can use the search function to specifically look for 'female Broly x male reader' stories. FanFiction.net also has a large collection, but the search might need some refinement to get the exact ones you want.
Some Tumblr blogs are dedicated to sharing and discussing fanfictions. You could search for relevant tags or ask in the fanfiction communities on Tumblr. There might be some users who can point you to great 'female Pennywise x male reader' fanfictions.