WE GET IT. YOU LIKE THE GODOT ENGINE.

imagine asgore holding a black shard in chapter 4 being like "now i can finally prove to them what really happened!" and he approaches toriel like "i finally found the shard i was distracted with, at the time, see?" showing her all dramatic and shit and toriel's just like

"how is this new information?"

and he's like "what."

and she's like "i know it was an accident. you were driving drunk."

and he's not getting it at all. he's confused and shit. and she's like

"did... did you think THAT was the issue?? that i didn't KNOW that???"

Dess isn't the black knight. She can't fit into the armor.

Carol isn't the black knight. She can't fit into the armor.

Rudy isn't the black knight. He can't fit into the armor.

Papyrus isn't the black knight. He can't fit into the helmet.

That leaves one remaining option.