Board Thread:General Discussion/@comment-39128364-20191124180454/@comment-27811026-20191201005053

Considering you fight all three in vastly different conditions it's hard to rank, but here's mine:

3. Photoshop Flowey

2. Asrial Dreemurr

1. Sans Undertale

I think Sans is the hardest because he easily killed me more than Asriel, even with more HP. Asriel also gives you a bunch of free healing, not even counting respawning. Photoshop Flowey and Asriel were definitely meant to be more cinematic final bosses anyway.