I need help with one of the final battles, Cipher Nascour. If you don't know which one I'm talking about, the battle is here and my comment, asking for help, is there too:

https://m.youtube.com/watch?v=NofBhO9ZjXg&rdm=261een12p&client=mv-google

Where do you think I should train more for this battle? My Pokemon are like 10 levels under his. I just lost, but I shut off my game cube without saving so I wouldn't waste more time and money in the game (I saved right before the four battles before him)...help for next time?

I beat the people right before him with ease, but I didn't like this battle!!!!

I gotta admit I don't know a lot about that game since, though I've wanted to try it, I haven't gotten the chance. However, I couldn't just leave you hanging so I did some searching and I did find on thing you could try. I hope it helps.

Copy-pasted from chaptercheats: When wanting to level a purified pokemon, you want it to be fast right? So what you need to do is this: Get the exp. share and One pokemon you want to level, as well as a shadow pokemon. Then go too MT. Battle and select an area which is about Five - Ten levels lower than your purified pokemon. Next, give your purified the exp. share and put it at the front of your party with the shadow pokemon. Then start the challange and fight up. The exp. share will give your purified pokemon double exp. and you will be purifing your shadow pokemon at the same time!
NOTE: This Hint/Cheat will only level a purified pokemon faster, NOT purify them faster

Your Pokemon are less than level 50 and you made it this far? Wow, I didn't dare to touch this arena before my Pokemon were at least level 70, I'm certain there are other areas where you need this many levels.

Anyhow, just do what Spidey quoted. Mt Battle has 100 trainers to face, starting at a very low level but steadily increasing on the way to the top. You will need to complete all the zones there for storyline purposes (or so I remember), so better challenge them first.

I don't really see a need for Exp. Share, I've successfully completed the game without needing it thanks to Mt Battle and the many experience you gain from so many battles over and over. The Exp. Share lets you level up more Pokemon at once or quickly level up a certain Pokemon, so if you're not sure of your team or you want to do this quickly then better use it.

Oh, and if you allow me an spoiler, this guy isn't the final boss, so you better train your Pokemon a bit more because I think you cannot save right before battling the true boss. I would aim for level 65 at the very least, but that's just me.

Ah, okay. Mt. Battle it is, then! Thanks.