These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Hilarious in Hindsight: Writer/translator Leslie Swan, who worked on the Super Mario Adventures comic, has voiced two female characters in the Mario series: Peach and Mona from WarioWare. Now note the sequence where Peach shows up as part of a pizza delivery, matching Mona's employment in Twisted. Better yet, the delivery was made by Yoshi, making him a Pizza Dinosaur.
Inferred Holocaust: Try not to think about the implications of dozens of Boos, complete with a Big Boo, who can't be stopped by staring at them, and have no problem leaving their abode even in broad daylight. And they're still on good terms with Bowser. Hopefully they won't take advantage of this.
The characters in Super Mario Adventures display some of the personality traits that would define them in later games — traits such as Luigi's cowardliness and fear of ghosts, Bowser's amorous feelings towards Peach, and Peach's willingness to fight to save Mario (which she does in Super Princess Peach), as well as the fact that Yoshi can only say his name.