No officially confirmed sources or canon material that suggest Midoriya has six quirks in the My Hero Academia manga or anime.
Throughout the story, Midoriya is shown to have only one quirk, which is One For All. This quirk was originally possessed by All Might, and it allows the user to stockpile immense amounts of power and transfer it to others. Midoriya inherited this quirk from All Might after the latter chose him as his successor.
In the story, there have been some hints about Midoriya potentially gaining new abilities or enhancements to his quirk, but none of them have been confirmed as additional quirks. For example, Midoriya’s ability to access the quirks of previous One For All users could be seen as a form of augmentation to his original quirk. Additionally, Midoriya has also developed better control and understanding of One For All, which has allowed him to use it more effectively.
However, there have been fan theories and rumors circulating about Midoriya potentially having additional quirks. These rumors are mostly based on speculation and have not been confirmed by the author or any official sources. It is important to note that fan theories and rumors should be taken with a grain of salt and not be considered as official canon unless confirmed otherwise.
In summary, there is no confirmed evidence or official sources that suggest Midoriya has six quirks. Midoriya is shown to have only one quirk, which is One For All. Any rumors or fan theories about Midoriya’s additional quirks should be approached with caution and not be considered as official canon unless confirmed otherwise by the author or official sources.