Train it.
you can use a fire stone, or you could level him up and hope for the best when he evolves.
route 205 for Pokemon diamond, pearl and platinum. the trainers have Pokemon from level 10 to level 17
In Pokemon Diamond i say Torrterra is the strongest grass and ground Pokemon because i have a level 100 one and it's great.
It depends. Find you Pokemon on theis site for the best information: www.serebii.net
The Pokemon center on victory road. for Pokemon levels around 20 go to the diner in the beach city.
A level 60 or up starter Pokemon dialgua or palkia and any Pokemon over 60 just not graveler
The best psychic Pokemon on Pokemon diamond is alakazam. It can beat an infernape level 100. who carez about a dull looking Pokemon with two unusually big mustaches... ew... but I like Lugia and Espeon... and Gallade... and Gardevoir... bronzong all the way haha
victory road
Diamond is not a Pokemon but i think Arceus is one of the strongest Pokemon ever.
the best Pokemon on diamond would be arceus but you can only get that from action replay, other than that i think the best Pokemon would be giritina..
go to the resort area and find a syther to battle and it will level your Pokemon about 615 points ________________________________________________________________________________________________ What about before the Pokemon league?
the best Pokemon for the Pokemon league is definetly latios