I think for me it wold be:torterra,raichu,empoleon,dialga,giratina(if you have national pokedex go to turn back cave and catch him)and latias.I have beten the elete four 5 times with this team.
most legendaries such as girintina, heatran, dialga, or arceus. my party is: dialga, palkia, heatran, girintina, and lugia. but i think the best Pokemon is a lvl. 100 ditto.
There is no "best" team. Just get many Pokemon with good abilities and attacks and put them in your party, if you train them very well you will have a "best" team.
Diamond is not a Pokemon but i think Arceus is one of the strongest Pokemon ever.
Dialga in Diamond. Palkia in Pearl. Giritina in Platinum. Zekrom in White and Reshiram in Black.
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to the level of the first Pokemon in the party
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..
If your asking to have no Pokemon in your party, NOT POSSIBLE UNLESS YOU HACK.
no
the best Pokemon for the Pokemon league is definetly latios
Palkia
the best Pokemon in diamond is arceus, but you have to use action replay or wi-fi mystery gift