The Scrappy: Ray Ray can and will grate on your nerves, primarily because he goes Squee! at various disasters unfolding in front of him, talks and yells almost incessantly, and even comes across as a mild annoyance to Juniper as well. The fact that he also acts a lot like the Trope Namer in terms of personality doesn't help.
They Copied It, So It Sucks: A few of this show's detractors will point out that this show's plot is almost the same as American Dragon: Jake Longnote Again a lot of this was just coincidence, not deliberate. Not helping matters is the fact that both shows came out virtually around the same year.
They Wasted a Perfectly Good Plot: Jasmine's house is riddled with old statues of former Te Xuan Ze's. Were the just there to revere the old protectors? In Out of the Past, Kai Yee is removed from a statue and then re-encased into a new one at the end of the episode.... which begs the question of whether or not all of the statues had a similar function.
In the crossover MMORPG FusionFall, there's a giant statue of Juniper in Forgotten Falls complete with waterfalls and a glowing tshirt logo, and a "Te Xuan Ze Inc." in Endsville, which are never given any in-game explanation. Might have been threads that CN tried to pick up but never really continued or built upon.
What an Idiot: Quite a few people get thrust into dangerous situations in the show, without any sense of gravity whatsoever (the tourists in episode 3, for example, think it's all part of the show when heavy objects are catapulted into their boat, which sinks and leaves them stranded in the ocean). sometimes even the monsters do this. Ray Ray tends to provoke this quite a bit some times.
They get super powers and the ability to see the supernatural, but they can't tell anyone, not even other members of their family or close friends. Since the supernatural is only seen by them, they spend a lot of time keeping the balance and often they have to head off to do so at a moments notice. This often leads to conflict with those around them who don't, and can't, understand why they're acting so oddly, isolating the Te Xuan Ze from others. One of the biggest issues is that until another Te Xuan Ze takes over, the current one must stay in Orchid Bay and he/she can't leave until he/she reaches adulthood and has children who can become the Te Xuan Ze. Until then, they are bound to the city, unable to go on vacation/trips/jobs outside the town or colleges outside of town. If their dream job is unavailable in the town, like Ah-Mah's was, then tough luck.
Ah-Mah suffered a lot from this as her only child did not become the Te Xuan Ze, meaning she spent twice as long bound to the rules and was only free after her granddaughter June takes over. During the show, she is often seen doing many wild and crazy thing that are not expected of a grandmother, but she does them because its the first time she has been able to in her life (well, at least outside of Orchid Bay).
Sort of. Juniper claims that's why she does it, and Ah-Mah doesn't deny on trying to catch up on life now that she has a grand-daughter, but she is actually traveling the world trying to find a way to allow Juniper to leave Orchid Bay.