99% of these PDFs are unauthorized pirated copies. The copyright for Pokémon Adventures is jointly held by Shogakukan (Japan) and VIZ Media (North America). Distributing a full-volume PDF without payment violates international copyright law.
However, before you click on those shady "free PDF download" links that populate the first few pages of search results, you need to understand the risks. pokemon adventures volume 1 pdf
Many newcomers make the mistake of assuming the Pokémon manga is simply a printed version of the anime. This is false. Pokémon Adventures, written by Hidenori Kusaka and illustrated by Mato (for the first nine volumes), is a separate continuity that is significantly closer to the tone and plot of the original Pokémon Red & Green video games. 99% of these PDFs are unauthorized pirated copies
Good news: You do not need to pirate Pokemon Adventures Volume 1 anymore. As of recent years, Viz Media has dramatically expanded its digital library. However, before you click on those shady "free
More importantly, the series is still alive and kicking. The creators deserve their royalties.