REvan342 the gyms and elite foure do not have reduced levels. they have higher levels!
Anyway Ill join the challange too
Name:Titang
Game:Pokemon Diamond
type:Fire and Normal
I have a question. Can we use HM slaves?
Upon research, we are both wrong. The Gym leaders of platinum are tougher, but the Elite four DO have lower levels than in D/P.
And to answer your question, yes HM slaves are allowed, however they cant be used in battles unless you absolutely have to. Ex. when you are in mount coronet and need strength/rock smash/waterfall/Defog. =)
Welcome to the challenge and "May the odds be ever in you favor"