Probably not without beating the other trainers of Kanto's E4 first.
Given that there's no cooldown on E4, just battle them again, without having server crashes, hopefully.
You got to find a good strategy, that's all.
Those bosses are meant to be hard, but most of them are considered being too easy anyway. Just build a decent team and you'll do fine.
Back luck in case of crash.
This is exactly why we need an auction house. Sellers should need to set up a description with moves on the poke, to make sure such things won't happen again.
Well, you'll get used to it in time. Make sure to check the dex for the moves, make sure to check various websites aswell.
Clefable can't relearn Moonlight, for instance, make sure you check such things before starting to raise Pokemon.