In 2010, ApeClubHTML published an article about how to enter into some "secret areas" in the first Ape Escape, using a Japanese version (100% finished) and a PocketStation. Those requirements made really harder to possibility to rapidly check the authenticity of the aforesaid article.
Despite this fact, I've done some researches about those 2 pictures used in the article as an "indubitable proof". According to the author, they were published in the official Japanese website, now closed. However, I can guarantee that those pictures are 100% FAKE, and have been Photoshopped (or manipulated) and cropped. Here's the proof:
First Fake picture from ApeClubHTML with the random generated "Green mailbox" (The circle shadow below the mailbox is missing):
Original picture, with Spike in the same position, using the same gadget (the Dash Hoop):
The mailbox has been added from this picture, and making it green is really easy on Photoshop:
Second FAKE picture from ApeClubHTML (zoom to see some green parts remaining around Spike's shadow, which should NOT be here if it was an original screenshot):
This FALSE "water level" was a cropped version from this picture. Spike is in the same position, the green lawn has the SAME shadows & marks as the "blue" one. Those bricks are also following the same pattern, and in the same position:
In any case, whether or not ApeClubHTML will publish something in the near future, do not trust them.