Although Crush was aired as the series pilot, it features both Dr. Drakken & Shego, who were a strangers to Kim and company until Tick-Tick-Tick (2002), and Kim's grappling gun, which she obtained in Bueno Nacho (2002). This suggests that the early episodes were not always aired in production order.
First appearance of the running gag of Ron losing his pants.
Despite Being The First Episode To Be Released It Was Actually The 5th Episode To Be Produced