
The book covers a ton of content, so I've had to try posting a general summary of the book and as briefly as possible. I apologize if it seems rushed.
So there's some original content here I'd like to share, including two pages dedicated to Keitai Denjuu Telefang. I hope it's useful for anyone who can understand Japanese better than me who wants to look at the information.
Hit-Japan has re-listed one of these books, if anyone is interested.
Here's some details about what's inside the book:
There's a front sheet inside the book featuring an upcoming Picross game by Hudson Soft, Rockman EXE (Megaman Battle Network), Pinobee, another game which I can't identify and Space Net: Cosmo Blue version. Space Net as some know is the sequel to Sanrio Time Net, another monster-battling game.

The next two pages are the contents page and the front sheet for a section called 'Game Boy Advance World'.

Note that this looks like a prototype build of the Game Boy Advance, as you can see the buttons and 'Game Boy Advance' logo are different! You can also see this Game Boy Advance model on the back of the book.
There was also a Game Boy Advance BIOS dumped in Japan that features a different opening sound effect. I'm inclined to think this and the prototype build might be linked, although it could easily be a coincidence.
The GBA 'Debug' BIOS
Pages 4-5 then list some specifications and technical information about the Game Boy Advance system.
Game Boy Advance specs
The next few pages list one-three pages dedicated to anticipated Game Boy Advance games. They are respectively, Mario Kart Advance, Rockman EXE, another Japan-only game by Hudson Soft, the Picross game, Golden Sun, Napoleon, Pinobee and Winning Post for Game Boy Advance. (pp. 6-21)
From pages 22-23 there is some brief information for eleven Game Boy Advance games. One of them, notably is Horse Racing Creation Derby (aka, Baketsu Daisakusen 馬穴大作戦). This was an anticipated game to be published by Nintendo that was never released. There's more information about it here. It was going to support the Mobile GB Adapter in some way. There's hardly any information about it on the Internet, so this is why the game interests me (top-right)

Next up is a chapter called GB Megahit Armageddon, first off there is a whole section dedicated to Pokémon Crystal which was almost ready to be released by the time this issue of Large Game Boy Encyclopedia was published. It tells you about how the game will support the Mobile GB Adapter, but unfortunately there isn't much here that isn't covered on Nintendo or Game Freak's archives. The authors gave it top marks in every aspect.

Pages 30-34 cover The Legend of Zelda: Oracle of Seasons, mentioning a bit about Oracle of Ages, while Page 35 covers Oracle of Ages.
From Pages 36-49 there are various lesser known games. I unfortunately can't recognize most of them. A few include Wizardry, Harobots and Grandia.
Pages 50-51 cover non other than Telefang! It's interesting that the authors called it a Megahit. It scores top marks in three aspects, although Pokémon Crystal and the Oracle games scored top marks in everything. Here are the pages about Telefang.

Pages 52-53 are about SpaceNet: Cosmo Blue Version, the successor to Sanrio Timenet: Kako-Hen and Mirai-Hen. Strangely, there isn't a page about the Cosmo Red version.
Pages 54-55 are about a game called Jibaku-kun Twelve World Story, which seems to be based on a manga series.
Pages 56-57 cover the Cross Hunter Game Boy games.
Pages 58-59 cover a One Piece game.
If you want scans for any other the above, feel free to leave a reply and ask.
Pages 60-61 cover Densetsu no Starfy before the development had moved from the Game Boy Color to the Game Boy Advance. This was one of the reasons I bought this book as I was hoping it would have some information about it, and luckily it did. There's some extra content here that wasn't listed on Nintendo's website.

Pages 62-64 cover more Game Boy Color games in less detail, such as Mobile Golf.
Pages 65 is a front cover for ordinary dot-matrix Game Boy games ('GB Special Selection') illustrated with Setsuna Kai and Mirai Kaname from Shin Megami Tensei: Devil Children - Black Book and Red Book. Unfortunately this section onwards is all in black and white.
On pages 66-67 it tells you information about the first two Devil Children games.
Pages 68-84 have me stumped without having to do some research. There are no Game Boy games I know here.
From Page 113 is a section called 'Popular character analysis'. Pages 113-117 cover Donkey Kong Game Boy games. Pages 118-121 cover Kakurenbo Battle Monster Tactics by Nintendo/Spiral. That game is not often talked about, but its actually rather great. It plays a bit like Fire Emblem and involves slaying monsters, scanning their abilities, collecting their scalps, and using them for special attacks in battle. I'm unsure if it sold very well in Japan, however.


Page 122-125 is about the Mario Golf series. It also has information about Mario Golf for the Nintendo 64, but not Mobile Golf.
Pages 126-128 cover Phantom Zona, another Nintendo published game based on the Phantom Zona TV series by TV Tokyo.
Pages 129-159 is information about more DMG games.
Pages 160-162 talk about the Nintendo Power flash RAM service and list all the games available for Game Boy Memory cartridges.
Pages 163-264 covers a lot more Game Boy games from 1997 up to 2000. Mostly, there are ten Game Boy page for each page, with very brief descriptions and a screenshot for each one. There's 994 Game Boy games covered on these pages! Some are grouped together, like Pokémon Gold and Silver, and Robopon: Sun and Star Versions, though in the case of Robopon it seems like the authors missed the Moon and Comic Bom Bom versions.
Pages 199-264 are a lot of Game Boy games from 1989-1997, the structure is about the same as pages 163-264.
Finally, pages 265-271 is the glossary of Game Boy games where you can refer to a particular game and look it up.