I like that the vagueness of Mario ...lore... exists. xD Many people have mamy takes on things and it's neat!

• Fawful and Cackletta is like a mother-son relationship.
• Fawful is pretty young too, he just graduated university.
• Bowser and Bowser Jr. are not related to the Koopalings (well, this is canon)
• Koopaling birth order is the order you fight them in SMB3 (the biggest being the second youngest and the second oldest being the smallest amuses me)
• The first three Paper Mario games took place in the normal universe while the rest take place in the book from Paper Jam
• If you touch or pet a yoshi it's pretty soft.
• Princess Peach is actually really really powerful. The rest she doesn't fight back against Bowser is because she doesn't particularly understand how her magic works and could instantly kill him or anyone else on accident.
• Bowser Jr. was born from Bowser wishing on a star that he could have a child. When the stork came he was shocked and in tears.
• Peach was born similarly. The Toads of the Mushroom Kingdom wished with all their hearts they could have a kind, gentle and wise ruler. She looks a bit funny because she's not a Toad, but that's OK.
• Mario thinks of Sonic as his even littler brother.
• Same with Ludwig towards Bowser Jr.
• Luigi constantly dreams about Prince Peasley and he is somewhat afraid of that.
• The Mario 64 evil piano is possessed by a Boo who is easily panicked.
• Kiddy Kong grows up to be Bowser-sized.
• "Ludwig" isn't Ludwig's birth name. He decided to change it after discovering his passion for music.