Sorry, your headcanon isn't canon. Whether or not you count Yoshi's Island as canon is completely irrelevant.
It doesn't matter where they come from. As far as we know, they do just pop up out of nowhere, because that's the explanation we were given.
I recommend re-watching the end cutscene of Super Mario Sunshine. Specifically, the scene of Bowser and Bowser Jr drifting away.
Because Bowser Jr's words and Bowser's reaction suggest that it's about revenge from post-Sunshine onward.
And you're continuing to show that you don't understand what I'm saying.
It's not about the message they were trying to convey. It's that they chose to convey it in the dumbest way possible. It was a goofy, childish line in a scene that was meant to be serious and heart-wrenching.
It completely killed the mood.
Again, it provided motive. This was Bowser Jr's debut appearance. Clearly, before Sunshine, he had no involvement in his father's plans.
The Peach plot thread is what got him into it. His defeat at the hands of Mario and desire to get him back for it is what drove him to continue.
The ice cream line, meanwhile, did nothing but kill the mood in a serious cutscene.
Still not as dumb as the ice cream scene.
It's literally called "Super Mario World 2: Yoshi's Island".
If it's not canon, neither is Super Mario World.
Who said anything about Yoshi's Island DS?
I said Yoshi's New Island.
You mentioned the Lumas being created from stardust in the previous post.
That's a decent explanation, but the stork pulling babies out of nowhere is too nonsensical?
.....Or a teenager's reaction to his friend's death being to whine about ice cream?
You made a comment and people replied with their opinion on it?
Dear lord, it's like you're on some sort of public forum or something!
Uhhh....have you completely forgotten how the conversation went?
You: ZeRo said he voted for Sora! He'd be so perfect. <3
Epic Anna: Kingdom Hearts could replace Metal Gear as the "stupid story" series.
You: YEAH WELL NINTENDO GAMES HAVE DUMB STORIES TOO
Pretty sure you're the one being defensive, dood.
I'm sure everyone here has some sort of unpopular opinion. I have a ton of them, I could go on and on about all the things I like or hate that everyone else feels the opposite about. We're talking about a Square Enix franchise, so I'll give an on-topic example: I like Lightning, and the majority of the internet hates her. She's been bashed in this thread before. I've never cried about it. ¯\_(ツ)_/¯