In Generation IV, Gentleman Preston and Lass Connie are actually Trainers from the Gym, and will return there once Amphy has been cured. Also in Generation IV, once the player has spoken to her, Jasmine opens a door for them leading to an elevator that goes from the top floor directly back to the bottom.
The Glitter Lighthouse, known as the "Shining Lighthouse" in the English dub, remains an important landmark and a popular tourist attraction in Olivine City. However, a neighboring electric lighthouse now does most of its work. An Ampharos has historically been the light source, and this tradition continues under Myron's watch.
In Throwing in the Noctowl!, the light of the Shining Lighthouse helped Wings Alexander through the thick fog and avoid crashing his plane, which had Ash's group and Team Rocket aboard, into the Olivine sea cliffs. Janina, Jasmine, and a fully recovered Sparkle waved from the Shining Lighthouse as the plane corrected its course.
Jasmine makes a reference to this lighthouse when she meets the player in Sunyshore City. She says that one of the reasons Sunyshore reminds her of Olivine is because it has a tall lighthouse like her hometown.