If you're looking for manga similar to Gon-chan, you might like these titles.
Al is a white baby triceratops who was attacked by a T-Rex named Gaou. His first friend, a wandering triceratops named Mono, gave his life to save him. In order to get stronger to defeating Gauo, and to avenge Mono, Al sets out on a journey.
Life in the prehistoric era has never been more fun! While a group of Stegosauruses look for a tasty lunch buffet and friendly Pachycephalosauruses butt heads, a passing pair of Protoceratops debate the visage of a Velociraptor. From the looming Tyrannosaurus to the giant-clawed Therizinosaurus, each playful and fierce dinosaur will scheme, frolic, eat or be eaten!
The story revolves around a young girl named Uiba Shikatani and her newly found pet dinosaur, which is named after the only words that come out of its mouth, Muka Muka.
Max is obsessed with dinosaurs. He knows his Tapejara from his Pteranodon and can find fossils better than a trained paleontologist. When he discovers a stone tablet that transports him to the age of dinosaurs, it's a dream come true--until it becomes a nightmare. An evil genius named Dr. Z has enslaved the dinosaurs so he can use their hidden powers to take over the world! Now Max has to defeat Dr. Z and his Alpha Gang to save the ancient beasts and life as we know it.
The Blue Hole is a gateway that takes you back in time to a prehistoric age. In anticipation of the astonishing discovery, the United Kingdom and the United States dispatched a joint team to the Jurassic world 145 million years ago and embarked on a full-scale investigation. Just then, a sudden phenomenon cuts off communications with the modern world. Few people with limited equipment are left behind. Survival in a terrifying world where everything is unknown and dinosaurs roam free has begun!