If your child can name three hundred Pokémon but you can't get them to open a chapter book, this is your shelf, and it's an honest one. Most of what's here is not really reading in the way you might be picturing. The handbooks and the visual guide are lookup books, your child reads a stat block, not a page, and hunts down the one they want. One is a drawing book, one is a seek-and-find, and the first is a puzzle book for a child too little to read at all. Only the last one, the manga, is an actual story with a beginning and an end. That is not a complaint. A child holding four hundred Pokémon and their types in their head is doing real work, and for a lot of children this is the shelf where a book first stops feeling like homework. Pick by what your child actually wants to do, look one up, draw one, hunt for one, or read a story, and hand that over.
Here's how I'd sort this shelf, because the wall of Pokémon books in a shop all looks the same and these do very different things. There are a few kinds here. Look-it-up books: the Super Duper handbook lists every Pokémon, the Legendary and Mythical one covers just the rare ones with a bit of their lore, and the DK Visual Companion maps the wider world of the show. Your child reads these in short bursts, one entry at a time, and that browsing is real, it holds a mountain of detail in a small head. A draw-it book, How to Draw Pokémon, where the pull is the pencil. A hunt-for-it book, Where's Pikachu, all looking and no text. A puzzle book for the littlest fan who can't read yet, My First Book of Pokémon. Then one real story, Pokémon Adventures, the manga, the only thing here with a plot that starts and finishes. The question underneath all of this is whether any of it leads to actual books, and the honest answer is that it can, but not on its own. A handbook is where a reluctant reader decides a book is on their side, and that matters, but the leap to a story is a separate step you make by handing over the manga, or a comic, or the video-game shelf next door, when your child seems ready. Reach for whichever kind fits what your child wants to do this week.