>>45353318>basically every single other E4 was made up of literally whosGen 2 had Koga/Lance, 3 had Wallace/Steven, Gen 4 had Flint and Cynthia, Gen 5 had Caitlin and Alder, Gen 6 even had Malva, though they didn't really do anything with her.
Those were all well executed because you either didn't fight them before the E4 battle, they got played up but not fought during the story, or the last time you fought them was an entirely different game.
You raised a ground/fighting type to deal with Olivia already hours ago. If she's back you just bring that one back in.