The rival's starter gets up to level 85
of course everybody know's its arceus.
The strongest Pokemon I met is a 100 lvl Magikarp in Resort Area(I call it King Magikarp :D )
That all comes down to opinion. Everyone has different opinions about which is the strongest and which is the best.
There are many Water Type Pokemon in Pokemon Platinum, however, there is only one strongest one. That Pokemon is Palkia. Palkia is one of the Main Storyline Legendaries in Pokemon Pearl, it is a Water/Dragon Type. If you are looking for the strongest Non-Legendary, your best bet is Gyarados. Any exceptions?
The strongest rod to bring in rare Pokemon is the Super Rod. It can reel in Pokemon like Gyarados, Sharpedo, and other rare Pokemon without having to evolve their pre-evolution forms.
Heatran is a ledgendary in Pokemon platinum.
Giratina
There isn't one.You can train well,and any Pokemon can be the strongest.But there really is not a strongest Pokemon.
no one nows
The easyest Pokemon is scizer and the hardest Pokemon is milotic.
The Frontier Brains and the Champions.
when you battle Pokemon champion Cynthia in Pokemon pearl,platinum,and diamond her strongest Pokemon is garchomp
In my opinion torterra is the strongest Pokemon. In order for this Pokemon to be the strongest, it must know these four moves: Frenzy Plant Earthquake Crunch Giga Drain
The strongest Pokemon I met is a 100 lvl Magikarp in Resort Area(I call it King Magikarp :D )
It all depends on the level and the moves it knows.
arceus is i said party not single pokemon.
Raiku the electric dog on leaf green and fire red versions
The rival the third time you battle him in survival area