Stupid Mario Brothers/WMG

Coconut is a Time Lord
How ELSE would he know about Link and everything?

Mario, Luigi, Wario, Waluigi and Decious are special Firebenders
How ELSE would they be able to make Fireballs Fire Flower-less?
 * The four seem to be a mix of their Mario and Smash Bros incarnations.

Bowser will be the Big Bad of the Final Season
He's been around since the beginning and has yet to have an actual fight with the Bros. That practically screams foreshadowing.
 * He did fight Mario in the Movie
 * Now Jossed; he is a villain; but not the Big Bad

The Dance Critic is The Lady of the Lake from Arther vs. the Druids vs. the Grail
Notice the incantations she whispers just before Mario and Luigi show up.
 * It should be worth noting they are the same actress but it's possible.