Question: What is the title of a 2002 American animated science fiction comedy-drama film with an illegally-made, genetically-engineered, extraterrestrial lifeform resembling a blue koala and his adopter and best friend who is also its primary protagonist? 
Sentence (from "Stitch (Disney)"): Stitch was created by "Lilo & Stitch" co-writer and co-director Chris Sanders, who also voices him in almost all media that he appears in.
Relevant evidence: No