Board Thread:General Discussion/@comment-10788405-20160720031315/@comment-10788405-20160720075235

Also, the Photoshop Flowey form is something that Flowey seems to be able to transform into willingly

in the true pacifist ending, we see that after Flowey absorbed the Human souls and bound Frisk's friends with a photoshop vine, he was able to retain his normal flower form