Aside from the main cast, their families, and some villains (like Giovanni, Butch/Cassidy, etc.), there have been a lot of older recurring characters that have completely vanished in the show.
These are characters who appeared for more than one episode so they aren't filler characters. Unless the writers suddenly get nostalgic, its safe to say some (or all) of these characters will never appear again:
Todd
Duplica
Suzie (girl who gave Brock Vulpix)
Richie
Casey
Sakura
Aya
Harrison
Morrison
Tyson
Nicholai
Thatcher (kid with Plusle/Minun)
Shauna
All Team Aqua/Magma characters since they disbanded
Brody (magma spy)
Spoink
The PMC
Prof. Elm
Prof. Birch (aside from possible flashbacks)
Macy
Most previous movie characters
Most older Gym leaders aside from flashback cameos
All AG rival coordinators except for Drew/Harley/Solidad
Vivian
Lillian
Scott from the Battle Frontier
Gary's cheerleaders (lol, whatever happened to them?)
I'm not going to put Jigglypuff there, since it could pop up again at some point even if its been gone for awhile.
I also won't put Team Rocket members there since its always possible we might see them again. I'm wondering if the writers forgot about Domino though, she hasn't been mentioned at all since her first appearance, has she? They seem to remember the other Rocket agents but not her.
Anyway, when you look at this list it actually brings back memories of some of these older characters and how the writers just phased them out of the anime. Makes me wonder what's going to have to the D/P recurring characters like Conway/Holly/Aoi when this saga ends.
These are characters who appeared for more than one episode so they aren't filler characters. Unless the writers suddenly get nostalgic, its safe to say some (or all) of these characters will never appear again:
Todd
Duplica
Suzie (girl who gave Brock Vulpix)
Richie
Casey
Sakura
Aya
Harrison
Morrison
Tyson
Nicholai
Thatcher (kid with Plusle/Minun)
Shauna
All Team Aqua/Magma characters since they disbanded
Brody (magma spy)
Spoink
The PMC
Prof. Elm
Prof. Birch (aside from possible flashbacks)
Macy
Most previous movie characters
Most older Gym leaders aside from flashback cameos
All AG rival coordinators except for Drew/Harley/Solidad
Vivian
Lillian
Scott from the Battle Frontier
Gary's cheerleaders (lol, whatever happened to them?)
I'm not going to put Jigglypuff there, since it could pop up again at some point even if its been gone for awhile.
I also won't put Team Rocket members there since its always possible we might see them again. I'm wondering if the writers forgot about Domino though, she hasn't been mentioned at all since her first appearance, has she? They seem to remember the other Rocket agents but not her.
Anyway, when you look at this list it actually brings back memories of some of these older characters and how the writers just phased them out of the anime. Makes me wonder what's going to have to the D/P recurring characters like Conway/Holly/Aoi when this saga ends.