The Elite 4 just mainly gets upped, though Lance gains a Ttar, Karen a Honchkrow, and Bruno a Steelix. Surge loses an Electrode for a Jolteon and gains an Electivire. Sabrina gains a Slowbro. Misty, Erika, and Janine are upped, though Erika gets Tangrowth. Brock gets a Nosepass to replace the Onix, though he could get a Bastiodon or Sudowoodo-or maybe he could get fossil pokemon from the 3rd gen. Blaine gets an Infernape. Blue gets a up. Red becomes close to mastered.
Thats The Only Thing That Got Me. There's NO WAY Gamefreak Will Replace Brock's Onix. That's His Like Main Pokemon. Though It Could Evolve Into Steelix Just Like In The Anime.