The “American Dragon” (Disney) was seen 1st to air before “THE LIFE AND TIMES OF JUNIPER LEE” (Cartoon Network) on TV. Both story is set in New York, both have a talking dog who also acts as their guide and teacher, both have a sibling who also have undevelop powers, both deals w/ magical creatures, both are keepers of 2 dimensions,
both inherited their powers, both have the same initials (J.L.) and both main characters are Asian. There are few differences between them such as shape-shifting abilities, extra sidekicks, love interest and gender. I'm starting to think that both stories were from the same writer.