Is this pokemon diamond real or a knockoff? any and all help is

Pokémon Adventures: Diamond and by Hidenori Kusaka

Is this Pokémon Diamond cartridge fake? Sorry for bad lighting. : r/pokemon

Pokémon Adventures: Diamond and Pearl/Platinum, Vol. 5, Book by Hidenori Kusaka, Satoshi Yamamoto, Official Publisher Page

Definitely fake, right? (Pokemon Diamond) : r/gameverifying

Tyranitar (Pokémon Diamond - Personal Copy), Chuggaaconroy Wiki

How to spot fake/counterfeit Pokemon games.

The ultimate guide to spotting fake Pokémon games: Game Boy, Advance, DS, and more

Pokemon Diamond And Pearl Preorders: Double Pack, Release Date, And More - GameSpot

REAL Pokemon Pearl compared to FAKE Pokemon pearl: How to identify Fake Pokemon Games

Fake Pokémon Diamond, SuperGameEskimo Wiki