You're browsing the GameFAQs Message Boards as a guest. Sign Up for free (or Log In if you already have an account) to be able to post messages, change how messages are displayed, and view media in posts.
I had just collected the last skull tooth, and I wanted to try the Livid Dead stage before I finish Moody Clouds. When I got to Big Mama, I noticed that when I dash attacked the launch bouncy thing, then jumped back at the last moment, Big Mama goes on to her next sequence. So I did this a bunch of times, and then suddenly she's defeated, without me actually attacking her.
BUT!!! After waiting through the credits, I was stuck at the world map and I couldn't go anywhere! I tried exiting to the main menu then loading the game, but it just said the save file was corrupt. I tried exiting the game then loading the save file, but I was still stuck at the world map.
In conclusion, don't do what I do, or you won't get to finish your game.
...I think I'll watch a playthrough to see how it ends.