Found this online. Someone hacked a ROM and found this. It's the Johto and Kanto Gym Leader rematch teams!! I sent it to Serebii and Coronis, but I don't know if they'll respond.
Falkner's second team is: Lv.50 Staraptor, Lv.52 Noctowl, Lv.52 Swellow, Lv.54 Honchkrow, Lv.48 Pelipper, Lv.56 Pidgeot.
Bugsy's second team is: Lv.56 Scizor, Lv.48 Shedinja, Lv.52 Yanmega, Lv.55 Pinsir, Lv.54 Heracross, Lv.52 Vespiquen.
Whitney's second team is: Lv.52 Girafarig, Lv.50 Lickilicky, Lv.54 Bibarel, Lv.54 Delcatty, Lv.52 Clefable, Lv.58 Miltank.
Morty's second team is: Lv.52 Drifblim, Lv.52 Dusknoir, Lv.52 Sableye, Lv.54 Mismagius, Lv.57 Gengar, Lv.57 Gengar.
Pryce's second team is: Lv.56 Abomasnow, Lv.58 Dewgong, Lv.52 Glalie, Lv.52 Froslass, Lv.54 Walrein, Lv.60 Mamoswine.
Jasmine's second team is: Lv.52 Metagross, Lv.56 Magnezone, Lv.52 Skarmory, Lv.50 Bronzong, Lv.52 Empoleon, Lv.62 Steelix.
Chuck's second team is: Lv.54 Medicham, Lv.52 Hitmonchan, Lv.55 Hitmonlee, Lv.54 Breloom, Lv.56 Primeape, Lv.60 Poliwrath.
Clair's second team is: Lv.56 Gyarados, Lv.52 Dragonair, Lv.52 Aerodactyl, Lv.56 Kingdra, Lv.52 Charizard, Lv.60 Dragonite.
Brock's second team is: Lv.55 Golem, Lv.54 Relicanth, Lv.56 Omastar, Lv.61 Onix, Lv.55 Kabutops, Lv.57 Rampardos.
Misty's second team is: Lv.60 Starmie, Lv.56 Quagsire, Lv.56 Lapras, Lv.54 Lanturn, Lv.54 Floatzel, Lv.60 Milotic.
Lt. Surge's second team is: Lv.60 Raichu, Lv.52 Manectric, Lv.52 Magnezone, Lv.52 Electrode, Lv.58 Pachirisu, Lv.56 Electivire.
Erika's second team is: -Lv.54 Shiftry, Lv.53 Jumpluff, Lv.56 Victreebel, Lv.56 Bellossom, Lv.60 Tangrowth, Lv.55 Roserade.
Janine's second team is: Lv.52 Crobat, Lv.56 Weezing, Lv.52 Toxicroak, Lv.58 Ariados, Lv.59 Venomoth, Lv.55 Drapion.
Sabina's second team is: Lv.60 Alakazam, Lv.58 Espeon, Lv.56 Mr. Mime, Lv.54 Jynx, Lv.53 Wobbuffet, Lv.53 Gallade.
Blaine's second team is: Lv.54 Torkoal, Lv.57 Camerupt, Lv.60 Rapidash, Lv.58 Magcargo, Lv.54 Houndoom, Lv.62 Magmortar.
Gary's second team is: Lv.67 Exeggutor, Lv.69 Machamp, Lv.70 Rhyperior, Lv.68 Arcanine, Lv.70 Tyranitar, Lv.72 Pidgeot.