- Not to be confused with Once Upon A Time - Undertale and Once Upon a Time - Undertale (note the lowercase "a"), two later SiIvaGunner rips based on this one
"Once Upon A Time - Undertale" is a high quality rip of "Once Upon A Time" from the game Undertale.
At 0:14 the melody is replaced with the melody of "Star Wars (Main Title)" by John Williams, the main musical theme of the Star Wars franchise. At 0:28 the melody switches back to the original and it turns into a mashup of "Once Upon a Time" and "Star Wars (Main Title)". At 0:58 the mashup ends, with only the original melody remaining.
This rip was uploaded on the GiIvaSunner channel on January 13, 2016. It hasn't been officially reuploaded since the channel's termination.
On July 21, 2016 SiIvaGunner uploaded Once Upon A Time - Undertale, a variation of this rip with The Nutshack added at the end of the rip. That rip was later unlisted for an unknown reason at an unknown date.
- This was the first mashup rip. It was also the first of the earliest GiIvaSunner rips not to accompany a melody change with a background image change.