>>35727422>The FANS call Red to Ultra Sun Core RPGs to differentiate them from MAINLINE games, which are ANY game called Pocket Monsters in Japan.Literally everything about this is wrong. The official Japanese term for the core RPGs from RB to USUM is "Pocket Monsters Series", and they're called that because they and only they feature the full phrase "Pocket Monsters" in the Japanese title while spinoffs use the abbreviated word "Pokemon". There are literally no games outside the core RPGs you listed that are called "Pocket Monsters" in Japan.
"Core Series" is the official English term for the Pocket Monsters Series. It's not a fan term, it's what TPCI calls the games. And "mainline" or "main series" is what fans called the core RPGs before TPCI started using "core series" officially, it was probably used by official sources too before "core series" was adopted. All three of the terms are equivalent and unambiguously refer to the same set of games, a set of games that LGPE are a part of. End of fucking story.