SMS Sonic Chaos "best ending" by mike89 in 14:28.55 (Obsoleted):

TAS Video: https://www.youtube.com/watch?v=4l33zrEIwTc

TAS Info: https://tasvideos.org/1504M

Publish Date: 4/11/2010

Or…

SMS Sonic Chaos "best ending" by The8bitbeast in 14:06.72:

TAS Video: https://www.youtube.com/watch?v=f1EFA2daijs

TAS Info: https://tasvideos.org/3632M

Publish Date: 2/15/2018

Description (For both of the TASes):

Robotnik is trying to take over South Island once again. Our blue little hero decides to stop him, while also collecting all the chaos emeralds in his free time. A glitch which allows Sonic to skip the cutscene after most bosses helps him to proceed even faster to the following zone.