Don't listen to critics. Whenever a kids TV show or movie comes along, they assume it is terrible just because it is for kids and do not watch it. Now if Lego does it, imagine. I thought it would be dorky and childish, but it had great characters, awesome villains, pretty cool fight scenes, heart and a couple of laughs. The only unoriginal season was the third one, which was purely for comedy. If anyone says it is a copy of bey blade or TMNT, remind them to not judge a book by its cover. The voice acting is great, and even Lord Garmadon, the villain, winds up being good in the end and cares for his son, showing no human is totally evil (unless possessed). Overall, it is great, and though may have some one-liners, it is a kids show, what can you expect? Also some elements are kinda dark, like the overlord, lord Garmandon and the 4 weapons and the serpentine.
Review of Ninjago: Masters of Spinjitzu
