The show's final episode aired on March 21, 2007, after four seasons and 78 episodes. It was a natural conclusion to the show's storyline, with Mike and Lu going their separate ways after their time in the Magic Forest.
Therefore, the show wasn't "cancelled" in the traditional sense, but rather ended its run with a satisfying conclusion.
There were several factors that may have contributed to the show's ending, including:
* Shifting programming trends: Cartoon Network was shifting its focus towards shows with a more action-oriented and edgy style, which "Mike, Lu & Og" didn't fit.
* Decreasing viewership: The show's viewership had been steadily declining over the years, especially compared to other popular Cartoon Network shows.
* Creative decisions: The creators of the show may have felt that it had run its course and decided to end it on their own terms.
Ultimately, the reason for the show's ending is likely a combination of these factors. However, it's important to note that "Mike, Lu & Og" remained a popular and beloved show among its fans, even after its conclusion.