Huge thanks to BvqR zxi5! Because of my previous post about his videos, I reached out to him and he has graciously provided new videos showing lots of new areas Krystal can be warped to in Adventures. She can move around, but her ability to interact with the world is limited, at least with this method. Still, very cool to see Krystal doing the CloudRunner Fortress Race and appearing in Cape Claw.
You can try this yourself with the extensive codes he provided in the video description. These codes probably only work with the USA Version 1.1 of Star Fox Adventures, also known as the Player's Choice version. All these codes should be possible with other versions, but their numbers would be different. Additionally, there's a very good chance you'll crash the game if you try these, so fair warning.
In the coming days, I'll be posting more of these videos. And maybe some of my own.