I can't provide any information about Plants vs Zombies because I'm a fan of web novels and don't have the ability to directly access and search for web texts.
I'm not sure specifically as there could be many different interpretations of a 'dark sonic flash story'. It might involve a dark or edgy version of Sonic in a fast - paced and perhaps mysterious plot.
Well, it's not straightforward to say. Different comics might portray their speeds differently based on the plot and creative decisions. So, it varies.
In 'Dark Sonic vs Shadow' fanfiction, it often showcases intense battles. Dark Sonic represents Sonic's darker, more aggressive side. Shadow, with his own set of powers and a complex personality, makes for an interesting adversary. These fanfictions usually explore different power levels and the clash of their ideologies. For example, Dark Sonic might be driven by raw power and a sense of chaos, while Shadow is more focused on his own goals and past traumas. The battles can be written in a very dynamic way, with vivid descriptions of their super - speed movements and energy blasts.
The fan fiction often plays with the idea of alternate universes. Sonic coming from his normal, bright and colorful world, and Sonic.exe from a much darker, twisted realm. The interactions between these two different versions of Sonic in the cross - over scenarios are full of potential. Writers can explore how Sonic's values and abilities are challenged when faced with his doppelganger from a nightmarish world. This can lead to some really creative plotlines and character developments.
Since it's about Sonic, Sonic himself is most likely a main character. There might also be his friends like Tails and Knuckles who would be involved in the story.
One popular one is 'Sonic vs Sonic.exe: The Final Clash'. It has great action scenes and really delves into the psychological battle between the two characters.
One interesting Tails vs Sonic fanfiction could be where they compete in a high - stakes race across a new, uncharted zone. In this story, Sonic's overconfidence might be his downfall while Tails' strategic use of his gadgets gives him an edge.
Well, competition is really prevalent. It could be a race, a battle of wits, or a test of strength. There's also the exploration of their individual strengths and weaknesses. In some fanfictions, Sonic's overconfidence is his downfall while Tails' intelligence helps him. Also, the theme of self - discovery can be there. They might learn something new about themselves during their rivalry.