From 2010 onwards, some emoji character sets have been incorporated into Unicode, a standard system for indexing characters, which has allowed them to be used outside Japan and to be standardised across different operating systems.
Dipper is a 12-year-old (13-year-old by the end of the series) boy who, along with his twin sister Mabel, is sent to spend his summer vacation in his great uncle's tourist trap, The Mystery Shack. He endeavors to uncover the secrets of the fictional town of Gravity Falls and to find explanations for assorted strange situations.
Pinkie Pie is 17 or 18, so that means she is 18 or 19 years old. For Rainbow Dash? I coooould say she is the same age as Pinkie Pie or Fluttershy, so 17-19 years old. Reason for putting Fluttershy and Dashie close of age is,since Dasihe and Fluttershy known each other since they were young and in flight school.