About “Grandpa Danger”
Grandpa Danger is an adventure manga series by Kazutoshi Soyama, first published by Shogakukan in CoroCoro Comic in October 2001. It was adapted into a 51-episode anime broadcast on TV Tokyo from April 2004 to March 2005, licensed in North America by Viz Media as Grandpa Danger, and also spawned a series of video games. A second anime series premiered on October 20, 2012. (Summary adapted from Wikipedia, CC BY-SA 4.0.)
Some summaries adapted from Wikipedia, CC BY-SA 4.0.