For years, fans debated the existence of an unaired pilot with different character designs (such as Martin having pink pants). This was eventually

Martin Mystery's character design is one of the most recognizable in animation history. A "verified" Martin Mystery look consists of: yellow bowling shirt with red and orange flames. blue cargo pants with multiple pockets.

: A comprehensive archive of all characters, gadgets, and creatures. Martin Mystery (2003) Gallery : High-resolution stills and production art. MMartinMysteryM Blogspot