Thread:KockaAdmiralac/@comment-30898313-20170322163536/@comment-27701762-20170322183957

Kocka is correct. Killing Flowey does not affect your ability to get the True Pacifist Ending in any way. You did miss out on a hint that Flowey would have given you on how to get TPE, but you aren't blocked from the ending itself.

At no point are you ever properly "blocked" from any of the endings, with the half-exception of needing to complete the Neutral Route before completing True Pacifist.