"Please don't question my curiosity"
According to the most intuitive/accurate source, these Pokémon learn moves at level 69.
Golduck - Wonder Room (or at least in previous generations. Now it learns it at lv. 60) Golem - Heavy Slam Typhlosion - Double Edge Jumpluff - Memento Swampert - Hammer Arm Phione - Rain Dance Manaphy - Rain Dance Jellicent - Water Spout Eelektrik - Zap Cannon Lampent - Overheat
Delphox - Future Sight
I also went through EVERY SINGLE GEN VI POKEMON and found that Delphox also learns Future Sight at level 69. You're welcome. :)
Source
Because of absolutely no proper reasoning, I decided to make an updated answer for this wondrous thread. Basically, it'll use the BDSP/SwSh learnsets, and if a Pokemon isn't in either game, it'll use its US/UM learnset. At the time of writing this, I was ranked #169 on the leaderboard too. No reason as to why I shared that info.
Golbat - Leech Life Typhlosion - Double-Edge Crobat - Leech Life Jumpluff - Memento Phione - Rain Dance Manaphy - Rain Dance Eelektrik - Zap Cannon
Thanks, America
as of generation 9, the following pokémon learn a move at level 69 through leveling up: