>>58861171>FrontierIntroduced in Pokemon Emerald with 7 facilities, including the classic Battle Tower, returning from Ruby & Sapphire. Gen 4 has a different Battle Frontier with 5 facilities, but the Battle Tower (and Factory) returns with more options, such as Wi-Fi battles.
>Battle SubwayUnova's version of the Battle Tower, introduces endless super lines with tougher opponents.
>PWTOnly in B2W2, notable for having legacy NPCs from past games to fight.
>Maison?Kalos and Gen 6 Hoenn's version of the Tower. Has the super system, but gets rid of the Wi-Fi battles in exchange for Triples and Rotation, gimmick modes nobody cares about, but it gives off the illusion of more content.
Gen 3 Frontier > Gen 4 Frontier > PWT > Subway > (Power gap) > Maison