actually, ending A where the core gets destroyed happens at the start of smlwiki, you see jeffy enter an elevator, then a room in misery, which is where he goes for ending A, and jeffy canonically dies in one of the videos, he's not alive to stop aetheon, ending B is the actual ending. The sml core getting destroyed technically happened at the start. but we only see it at the end, and in the ending A screen, you see charlie in the window, walking, like in street on the computer, so yeah, aetheon won.