It depends on the trainer really. A lot of trainers prefer to breed their starters. But you can train a Mareep to a Flaffy to an Ampharos (whom I adore).
or a Magikarp to a Gyarados (COOLEST, AND GODLY STRENGTH.)
you should just go to http://www.serebii.com/ and flip through the pokedex :)
u want the coolest Pokemon of all? cool, to get him get Remoraid raise to level 25 and u have him....let him learn Octazooka its his best move
try your best to find spirtomb in Pokemon platinum
Steelix
Darkrai
6 bidoof
the answer is mew two
well to opinion the best beginner in Pokemon platinum is chimchar
Most definitely not! Pokemon Platinum is by far the best. Let the best trainer win!
POKEMON PLATINUM stupid!
Arceus
Darkrai.
KYOGRE and PALKIA.