Only the first season was broadcast in the United States on Cartoon Network.
There are some people out there who are convinced the show was from Teletoon when in fact it was created by Nerd Corps Entertainment for YTV. This might be due to the fact that it was brought over stateside to Cartoon Network in the late 2000s alongside several Teletoon series, being the only YTV show shown on that channel (asides from Storm Hawks, another Nerd Corps cartoon) until the early 2010s brought in a few more shows.
In Britain, CBBC got to air the third season before Canada did.
The show was inspired by the sketch titled "Once Were Heroes" by Ryan Harper-Brown.