This Sgt. Frog (Keroro Gunso) wallpaper might contain
diagrama de venn, diagrama venn, anime, banda desenhada, manga, desenhos animados, mangá, and quadrinhos.
But no, that dosen't meant that Pururu is a pekoponian. I think that's just a suit.. I think you can see this form at episode 180, "War is a huge hustle", and also at episode 201, "The battle of the women".