Talk:Achievements (Hollow Knight)/@comment-37136195-20200325090805/@comment-1713909-20200325204320

For what you don't need, the two final bosses are optional for the mark. In addition, every enemy/boss from the later content packs with the exception of the Hive Knight, Flukemunga and Pale Lurker are optional for it.

Yes, you need specifically that ending.