Sometimes the community-driven WikiSource has transcribed the complete work. The search is tricky because they may list it as "Memorias de una pulga - Volumen II" without a separate page. Check the "Contenido" section of the main work.
The original English text is a single, relatively short novel (often divided into "volumes" in early editions, but these were part of one continuous story). memorias de una pulga tomo 2 free
When you see searches for "Tomo 2" in Spanish, this typically refers to one of two things: Lectores de ficción breve, aficionados a las fábulas
Lectores de ficción breve, aficionados a las fábulas modernas, quienes gustan de novelas con narradores animales (p. ej., estilos que mezclan humor y filosofía). Lectores de ficción breve
If you type the exact keyword "memorias de una pulga tomo 2 free" into Google, you will encounter a minefield. Many sites offering "free PDFs" of erotic literature are SEO traps loaded with pop-up ads, browser hijackers, or malware. Avoid any site that asks you to download a ".exe" file or complete a "survey" before downloading.
Here are the only safe, legal sources for Volume 2:
If you cannot find a free legal copy, purchasing the digital version (eBook) is usually very affordable (often cheaper than a coffee) and supports the translator/publisher.