Just to be clear, this isn't a backtobasics topic, at least not intended to be.
Do you believe in a coherent timeline for Mario games? They're mostly very loose storywise so it's easy to either piece together a timeline or shrug off the possibility, unlike most other series I play which have a clear chronological order (like Megaman for example).
So what's your position on a timeline for Mario games? Is Paper Mario a separate timeline? Is Super Mario RPG canon? Is Galaxy 2 an alternate universe? etc.