One thing I can tell you is that the ink stopping on the edge of the large image would only be consistent with an ink shortage if the pamphlets/posters were printed with an inkjet printer, something I highly doubt considering how expensive that form of printing is compared to laser and offset printing. Most posters/pamphlets, especially ones made by/for a company as large as Pokémon/Nintendo/Game Freak would likely be done via offset printing, and that sort of printing (same as laser) is done in layers, so you wouldn't have all the colours inexplicably stop at the same time like that. The ink trailing off DOES look like it could be a printing error, just not a professional one.
That alone makes me think it's a fake.
The fact that the image doesn't go all the way to the top is another matter. Many full-bleed (this means the image goes all the way to the edge with no border) printed items are printed with a bit extra around the edges of the "final" image and then with a white/paper-coloured border and crop marks (if you've ever seen a serial box or poster or something slightly miscut, you probably know what those look like). After printing, the final product is then cut before distribution. However, there are no distinctive crop marks appearing on what we can see on the image, and there even seems to be a bit of a darker border right on the edge. This lends further credence to believe that this is a fake. Even if it were a prototype design that was printed single-off in an office or something (which would account for the inkjet-look of the printing), it would likely still have those crop marks.