Video Game Walkthroughs
Shadow Bijou has kindly made video walkthroughs for the Hamtaro video games. These are filled with his sense of humour and awesome Australian accent. xD The Nazo Nazo Q guide was made by Mr. Delight.
Ham-Hams Unite
Ham-Ham Heartbreak
Hamtaro Rainbow Rescue
Ham-Ham Games
Nazo Nazo Q

If you're more interested in having an off-line version, or you want to read a walkthrough because you understand it better, then MikaUtsukushi has what you need.
Ham-Hams Unite
Ham-Ham Heartbreak
Hamtaro Rainbow Rescue
Ham-Ham Games