The Robloxian Extinction is an extinction event that occurred 700 million years ago. It lead to complete extinction of the 99% Robloxian species that existed at that time.
Robloxian Dinosaurs did not exist at that time. They materialized 470 million years ago. They even managed to survive the 450,000,000 BCE Great Bloxican Earthquake, which later would spark a chain reaction of disasters and combined with the Asteroid Hit of 450,000,000 BCE , it caused the extinction of the Despacito Humans. However, 150 million years later, an asteroid made extinct the Robloxian dinosaurs.