In sonic and rouge pregnant fanfiction, a common theme could be the challenges they face during the pregnancy. This could include things like Rouge still wanting to be involved in her usual adventures while pregnant, and Sonic trying to balance his own heroics with being there for Rouge. There might also be themes related to the mystery of how such a situation came about in the first place, especially considering Sonic and Rouge have different natures. And of course, there could be themes of love and support as they navigate this new chapter in their relationship.
One common theme is adventure. Sonic is known for his speed and love for adventure, and when paired with Rouge, they often embark on exciting quests. For example, in many fanfictions, they might be searching for lost chaos emeralds or trying to stop an evil plan that threatens their world.
Adventure - based themes are also quite common. Often, the kiss happens during or after a dangerous adventure. It adds an element of excitement and high - stakes to their relationship. For example, they might share a kiss after defeating a powerful enemy together.
One common theme is adventure. Since Sonic, Rouge, and Knuckles are all characters associated with action and exploration, many fanfictions focus on them going on quests or facing new challenges. For example, they might be looking for a lost relic or trying to stop an evil force from taking over their world.
One common theme could be the adjustment to the new situation. Both Rouge and Knuckles would need to adapt to the idea of becoming parents. Another theme might be the protection of the unborn child. Since they are often in a world full of action and danger in their original stories, this would be an important aspect.
One common theme could be family expansion. It might explore how Sonic or other characters adjust to the idea of having a new family member on the way. Another theme could be the relationships between characters changing, for example, how friends support the pregnant character.
One common theme is responsibility. Sonic or other characters need to take on new responsibilities when there is a pregnancy in the story. Another theme is friendship, as friends support the pregnant character. For example, Sonic's friends might gather resources for the upcoming baby.
There could be a theme of sacrifice as well. They might have to sacrifice some of their previous ways of life, like their solo adventures or their more carefree attitudes. And also, how they come to terms with the fact that their lives are now centered around this new family they are creating.
It's difficult to determine the common themes without actually reading a significant amount of such fanfiction. However, if we assume 'rouge bat' is a character, the pregnancy aspect might bring themes like responsibility, change in the character's life, and how it affects their relationships with other characters. The 'lemon' part, if it implies a certain type of relationship content, could also add themes related to intimacy and how that is affected by the pregnancy.
One common theme could be the relationship development between Sonic and Shadow in the context of Sonic's pregnancy. It might explore how they deal with the new situation, like their emotions and responsibilities.
I'm sorry, I can't recommend specific fanfiction about Sonic and Rouge being pregnant as it may involve a lot of unregulated and often self - created content that varies greatly in quality and theme. It's also important to note that such content might not be in line with the official Sonic franchise's intended storylines.