Kuru Kuru Kururin done in 5:05.75 (18345 frames) as stated in the Any% Normal rules on speedrun.com (complete all thirty main levels, don't save birds).
The TAS starts at Power On with the GB intro.
Time with speedrun.com timing: 4:57.93 (17876 frames)
Youtube video: https://youtu.be/tdnZhIvwhi0
OOB viewer to see what happens off camera view: https://github.com/E-Sh4rk/KururinTAS
Github of the project: https://github.com/mohoc/KuruTAS