- Jossed, sadly.
Obviously, Mario can't fight himself, so Bowser will probably use magic to create a clone that can make him meet his match (Metal Mario, maybe?).
- Jossed. Bowser is the Final Boss again.
- Jossed due to Executive Meddling. Parakarry and Goombella are mentioned and Rawk Hawk is given a small nod, but no one appears.
- Nope. Bowser doesn't speak in the ending, when he's in full control.
- On the other hand, Literary Agent Hypothesis could also apply here, meaning that the storynote did in fact, happen, but is told in the form of the aforementioned storybook.
- Partially confirmed. The Paper Mario world exists in a book, according to Mario & Luigi: Paper Jam, though it seems to be a one-of-a-kind magic book. No telling whether or not the Paper Mario adventures actually happened in some capacity in the normal Mario universe, though it's possible as the Star Spirits show up in Mario Party 5.
- Dry Bowser
- Rosalina and the Lumas, plus assorted baddies and bosses
- Pom Pom and assorted baddies
- Motley Boss Blob
Continuing on, notice how whenever Kersti is inconvenienced by anything, she never worries. Angry? Yes, she does get angry. But never does she worry. Why? Because she secretly controls the strings of the Royal Stickers' victims, and could probably call them off, or even order them to take care of the problem, if she made a real effort to exert control. That time Petey ate her? She was in control all along. When Bowser didn't listen to her, she wasn't actually trying to call him off or exerting any power. And what was used to defeat Megasparkle Bowser in the end? Not the combined power of the five Royal Stickers gathered so far...just Kersti.
To put it simply, helping Kersti and reviving her was probably the worst thing Mario could have done...