yes
no,they cannot. its impossible to do it.....tht's stupid.
It depends on their skillset and if they are EV trained or not. But overall level 100 Pokemon are quite strong.
It all depends not on Levels, but on their Stats; EVs and IVs. An Ev trained lvl 100 Pidgey with good IVs can easily beat a lvl 100 non-Ev trained Zangoose AND Seviper any day.
train it to be lvl 100
you have to train it until it's lvl 100
No,to EV train you need to win experience points,try breeding your lv 100 Pokemon and EV train him. I thought it would be informative to add that you can give the level 100 Pokemon 10 of each vitamin in five stats and 1 vitamin on the sixth stat. Sorry but that's the best you can do.
i don't think you can train Pokemon over lvl 100... my darkrai is lvl 100 and when i fight with him, he doesn't gain qany experience points :P
If you only mean not using action replay, then use pokesav. If you mean no cheats, then I have to say, there is no really quick way of getting your Pokemon to lvl 100. The E4 are your best bet's. If your EV training, then keep EV training until you get to lvl 100. Hope this helped.
train everything up to lvl 100
Simply put, train!
Just train one you can get it from firered or leafgreen.
you have to train or hack alot just don't hack that's not good but train on higher lvls i know this because i am lvl 157