OH MY GOD OH MY GOD OH MY GOD !! This is SUCH an underrated anime. I understand it's for kids but dang. I watched this and got addicted to it as a kid. SUCH a DANG nostalgic anime. Lemme explain what this is. K so there's a lot of stuff going on. Kids bullying other kids, disagreements between people and this kid (probably THE greatest kids show character) Hattori always helps them. Since he is a ninja he always thinks of such FUN and CLEVER ways to solve the problem. Now i don't like it AS much (it's still better than a lot of the animes coming out today)but man oh man is this good.
I listened to the theme song and now i'm literally CRYING !!
It doesn't deserve a 10 right now (more like a 8.5) but the nostalgic factor and how much i liked this made this a 10.

TRUST ME YOU WILL LOVE IT. GO WATCH IT RIGHT NOW !! NO MATTER WHAT YOUR AGE.