26 Episodes?
From The Lost Media Wiki
Unfortunately not all episodes that were aired have been uploaded to the internet, and thus we don't know their names. Note, however, that all known episodes fall within the first 26 episodes of the 2005 anime, so it can be concluded (along with other reasons, such as with many seasons of series being 26 episodes long, and that LUK Internacional's English Shin-chan dub has 26 episodes) that said 26 episodes were all that was dubbed, and probably have similar titles to their Japanese counterparts.