These are custom blueprints made for the creation of a desk set piece for Detective Pikachu. Specifically, they are blueprints for the rounded desk of Howard Clifford, a main character from the movie. This is one copy of the blueprints that was sent to one of the several departments checked off for production, and signed by the supervising art director for the film.
When unfolded, the blueprints show a Pikachu and a silhouette of Tim (the main character of the film) in the upper lefthand corner for a perspective on the real size of the desk. In the bottom right corner, the blueprints are labelled "Gumshoe" instead of "Detective Pikachu". This is because, while filming the movie, the codename "Gumshoe" was used so that paparazzi and fans did not crash the sets or discover production pieces during their creation. The letters "GS" were also used on some pieces as a shorthand for "Gumshoe".
