First, focus on the build - up. Create suspense before the transformation. Hint at what's going to happen with strange events or dialogue. Second, describe the transformation vividly. Use strong adjectives to show how Sans is changing. Third, give the transformation a purpose. It can't just be for show. Maybe he's transforming to save his friends or to face a powerful enemy.
One key element could be the visual transformation. The Gaster Blaster Sans might change in appearance, with his blasters taking on new forms or emitting different colors. Another aspect could be the power boost. Maybe his attacks become more powerful or have new effects. Also, the emotional state during the transformation can play a role. Is he enraged, desperate, or something else that triggers this change?
I'm not sure if there is such a specific fanfiction. There are countless fanfictions out there, and while crossovers can be really creative, this one seems rather unusual. It would be quite interesting to see how the Naruto universe and the concept related to Gaster could be combined, but it might be a rare find.
In such a fanfiction, Naruto could be in a situation where he enters a dimension similar to the Undertale world where Gaster exists. He could learn about Gaster's experiments and try to use that knowledge to better his own village. For example, if Gaster had some unique way of manipulating energy, Naruto could attempt to adapt it to chakra manipulation. The story could also explore how Naruto's values from his own world interact with the often strange and complex ideas associated with Gaster.
Well, clearly Blaster Blade and Blaster Dark are the main characters. Blaster Blade is often depicted as a heroic figure, with his unique abilities and noble personality. Blaster Dark, on the other hand, has a more mysterious and perhaps darker side to his character, which makes for an interesting contrast.
Well, it could be really interesting. Maybe Gaster would teach Naruto some unique and powerful magic or abilities that are different from the normal ninja skills in the Naruto world. Naruto might grow up with a very different perspective on power and friendship.
Well, Naruto might become more mysterious. Since Gaster is an unknown and rather enigmatic entity, Naruto could start having strange thoughts or powers that he doesn't fully understand at first. He might seem more withdrawn as he tries to figure out what's going on inside him, and his normal cheerful and straightforward personality could be clouded by the presence of Gaster.
In some fanfiction, there could be a story where Blaster Blade and Blaster Dark are actually long - lost brothers or have some deep connection from their past that they are unaware of. This connection could be explored and change their relationship from just rivals to something more complex.
He could gain the power of manipulation. Gaster might give Naruto the ability to manipulate space or time on a small scale. Maybe he could create small portals or slow down time for a short period during combat.
One common theme could be the exploration of their relationship in the context of the outertale universe. It might involve how they interact with the unique settings and other characters in that AU.