"Over Wintry Mountains - Super Smash Bros. UItimate" is a high quality rip of "Over Wintry Mountains" from Super Smash Bros. Ultimate.
At 0:04, an audio clip of Twilight Sparkle saying "Oh hi, Pinkie Pie!" from the My Little Pony: Friendship Is Magic episode "Party of One" plays. Immediately after, "Pinkie Pie's Singing Telegram", from the same My Little Pony episode, is mashed up with and pitch-shifted to the advertised track. At 0:31 and 0:55, "I Just Had Sex" by The Lonely Island ft. Akon and the gunshot from "pinkie just had sex!!!!!!!!!!" by theburninice1 are arranged to the track YTPMV-style. At 0:58, an audio clip of Pinkie Pie saying "Next time, I think I’ll just pass out written invitations" briefly replaces the vocals to "I Just Had Sex".
At 1:05, the vocals to "Astronaut in the Ocean" are mashed up with and pitch-shifted to the track in the same manner as "Pinkie Pie's Singing Telegram" as the rip fades out.