Can doujinshi get anime adaptations? Also can they become "real" Manga if good enough


Was wondering if doujinshi can get an anime adaptations and become real manga
that are officially sold by companies.




If by "doujinshi" you mean "self-published manga that parody other published
works" (probably the most restrictive definition), the answer is yes.
Examples:

  * _Nyoron Churuya-san_ (a _Suzumiya Haruhi no Yuuutsu_ doujin)

If you loosen the definition to "self-published manga", there are even more
examples:

  * _Sore ga Seiyuu!_
  * _Getsuyoubi no Tawawa_

If you go further and consider _all_ self-published works (including webcomics
and text-only media), there are even more:

  * _Maoyuu Maou Yuusha_ (originally a series of posts on 2ch)
  * _Isekai wa Smartphone to Tomo ni_ (originally posted on "Shousetsuka ni Narou")
  * _Re:Zero_ (likewise)
  * _One Punch Man_ (originally a webcomic)

This is by no means a rare phenomenon. Self-published stuff that becomes
popular gets commercialized pretty often.

