So, guys, just jumping in here with my response. Sorry it took so long.
First off, this is the file where the Japanese blog pulls data from:
https://www.smashbros.com/data/bs/ja_JP/json/ja_JP.json
I did not bother checking the English version, but I would assume you just replace ja_JP in both instances with en_US (
https://www.smashbros.com/data/bs/en_US/json/en_US.json -- yup it works).
I made two detailed images about this.
First up, this is an examination of the latest three posts in the file.
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I took the snapshot in a good place to catch the titles of all three posts. There's two types of ID's. The first is what I think is the Wordpress Post ID. These are much higher than the Blog Post number. I think the blog Post Number is just to differentiate each specific post so people editing the blog know what they're doing.
Wordpress does a lot of weird things, such as saving revisions as entirely different posts. So that number jumps. The blog post number appears to be the exact post order of every blog post. However, I did not check the full history to confirm.
With Bowser being 142 and Toon Link's memory being 139, it seems like Bowser was pulled back from Wednesday's update. The two missing posts, 140 and 141, are probably a music and a stage, respectively. In the last few weeks these have both been coming together on Tuesday.
Bowser was pulled back to fill in a gap missing on Sunday. Sunday is typically always a fighter, with few exceptions. Keep that in mind. Richter was also on Sunday, though he had a memory to go with him.
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This is a breakdown of the details inside the "acf" object in each entry. At the bottom you can notice that it says wp:featuredmedia. This is what proves they are probably using Wordpress, though heavily modified. They're probably saving all data to JSON so that there isn't a way for people to access hidden data with AJAX.
This also shows where the images on Toon Link's memory are being grabbed, including the 139_1 and 139_2. Up to four images can be included, and video supports an id and url to the video.
I assume that videos and images are all their own custom post type, but I'm not fully certain on that one.
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Richter was posted on Monday in Japan, Sunday in the west.
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Dracula's Castle was posted on the same day as Gang-Plank Galleon, the Wednesday (in Japan, Tuesday in the west) after the Direct.
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Alucard was posted two weeks after the Direct on Friday in Japan, Thursday in the west.
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Ever since Mario we have never started a week with anything but a fighter.
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In terms of memories, Inklings, Ridley, Link, Corrin, Snake, Sonic, Pit (Dark Pit does), Mii Fighters, Samus, Chrom and Villager do not have memories. Sukapon does despite not being a playable fighter. Wario does, but its for WarioWare Gold.
Take from this what you will.
And mine is even more of one...
EDIT: Ridley and Inklings have not gotten a memory either. Daisy was the first. I added them to the list.