One common theme is friendship. Since they are both characters in the game, many fanfictions explore how they become friends, support each other during battles, and grow together. Another theme is rivalry. They are both skilled fighters, so there can be a lot of stories about their competitive nature.
You can try fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. These platforms have a large collection of fanfictions, and you can simply search for 'Super Smash Bros Marth x Ike' in their search bars to find relevant stories.
Yes. If you're a fan of the Smash Bros series, the 'Smash Bros World of Light Novel' can be a great read. It likely delves deeper into the lore and characters that you already love from the game, providing a different kind of experience compared to just playing the game.
Black Widow would rely on her agility and combat skills. She could have quick, multi - hit attacks like some of the faster characters in Smash Bros. Her special moves could include things like her Widow's Bite for a stun effect. Captain America, with his shield, could have a good balance of offense and defense. His shield throws could be ranged attacks, but he also needs to be vulnerable when he throws it, like in the actual Smash Bros. game where characters are exposed after certain attacks. This way, his power is not too overbearing.
A Cave Story quote in Smash Bros fanfiction could serve to establish a connection between the two universes. Maybe the quote is used as a sort of inspiration for a character's move set. Say a quote about quick movement is used to describe how a character has developed a new dash move in the Smash Bros world of the fanfic.
For some, the length of 10000 pages might be a deterrent. But if you're looking for a comprehensive exploration of the Smash Bros world, with all its characters and their relationships, it could potentially be very rewarding. You just have to be prepared for the long read.
The length of a Smash Bros fanfic can be all over the place. Some authors aim for a concise story and keep it under 10,000 words. But there are those who go all out and create epic tales that could exceed 100,000 words.