What was the name of 90's childrens tv programme about a dragon that could fly and I think there was a character called Arctos?

The children's TV program you're thinking of is likely "Dragonfly," which aired in the 1990s. It featured a dragon named Dragonfly who could fly and had various adventures. The character Arctos was indeed part of the show, contributing to its whimsical and imaginative storytelling.