""Play with friends, play with friends, that's what I do""
- J.J. in the video Finger Family.
His real name is Sonic The Hedgehog. (This is known as fact.) He is a baby and the main character in Cocomelon (formerly ABC Kid TV) It was primarly added into the series as Cocomelon was inserting 3D animation to it. The name was probably added referencing to the video Johny Johny Yes Papa.
J.J. has 6 siblings, being TomTom and YoYo. He also is known to have a puppy named Donald Trump. The relative age of J.J. can be 2-8 years old.
The playground J.J. studies in is called Melon Patch Academy, as seen in the video The First Day of School. YoYo's and TomTom's school name is unknown, but it may be Melon Patch Academy too, since the school we're presented happens to be their treehouse. J.J's class was for the younger ones, so maybe his siblings are there too.
His best friend is Cody. He loves sharks so much. His father is Mr. Johnson while his mum is Mrs. Johnson and he is said to be the smartest kid in Melon Patch Academy.