Cartoon Network’s friendly, orange, gooey ball of fun

You're referring to "Gooey Gus" from the Cartoon Network series "Foster's Home for Imaginary Friends." Gooey Gus is an orange, gooey creature who loves to have fun and is known for his friendly and playful demeanor. He's a lovable character from the show, bringing joy and laughter to the imaginary world of Foster's Home.