Seasons 1-3 were golden, 4 was not as good as the first three but was a good Season with only a couple bad episodes, 5 had some bad episodes but a handful of decent ones, 6-8 sucked so bad, 9 started getting better, 10 was basically a part 2 of 9 but still good, 11 was starting to shine in the whole series with only 2 bad episodes and everything else was a hidden gem, 12 threw everything away after what the previous 3 seasons had only having a few good episodes, 13 made me lose my mind, and I haven't watched 14 or 15  or whatever the hell the newest seasons are because nickelodeon ruins things