It's not mandatory to read the Pokemon manga in order. However, doing so can provide a deeper appreciation of character development and plot progression. Skipping around might cause a bit of confusion at times.
Well, sometimes you can find Pokemon manga on bookstore websites like Amazon or Barnes & Noble. Another option is to search for dedicated manga platforms that specifically focus on providing a wide selection of manga titles, including Pokemon.
In the Pokemon Alola Ultra Adventures fanfic regarding Greninja, it may start with Greninja arriving in Alola. It could then get into battles with the island Kahunas' Pokemon. Since Greninja is a very powerful Pokemon, it might be a key figure in some important events in Alola. For example, it could help protect the Alola region from some kind of threat that is not common in other regions. And it may also have some interactions with the Alolan forms of known Pokemon, which would be really interesting to read about.
You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. They usually have a wide selection of Pokemon Adventures Franticshipping fanfictions.
Pokemon Adventures Franticshipping fanfiction often explores unique relationships. It might involve characters like Silver and Gold in some complex and exciting storylines. The fanfiction can bring out different aspects of their personalities that might not be fully explored in the original Pokemon Adventures.
Yes, Pokemon is a manga. It offers fans another way to engage with the Pokemon world, often featuring unique takes on the familiar elements and adding depth to the overall narrative.