While a complete "official" digital archive is rare, you can sometimes find official eBook versions on:
The best way to support the artist is to buy the physical books directly. Medina ships via courier (LBC/2GO) across the Philippines. However, he also sells E-books—but careful, they are not standard PDFs. He has experimented with encrypted EPUB files and proprietary app-based readers. Check his "Shop" section regularly.
Pugad Baboy is primarily in Tagalog (Filipino) with heavy use of colloquialisms and code-switching (Taglish). Some later volumes include footnotes explaining obscure jokes for non-native speakers.
Before diving into the PDFs, it is important to understand the content.
If you stumble upon a "free" Pugad Baboy comics PDF on a random forum, check for these red flags: