well, it dipends on your fighting stile. If you like balanced stats chose TURWIG. If attack and speed is what you want Chimchar is the top contender. But with all but special defense with him piplup is my favorite and strongest Pokemon of the three starters.
I also like piplup but, It is easier to go through the game with a Vaporeon, or a Gyarados.
I would use Electivire, Roserade, Gastrodon, Infernape, Gallade, and Gachomp. That's the team i use and I haven't been beaten yet
Pick him as your starter
Technically Cyndiquil is the strongest but it all depends on what type of Pokemon you want.
The easyest Pokemon is scizer and the hardest Pokemon is milotic.
still the same Pokemon as d/p chimchar, piplup, and turtwig
arceus is i said party not single pokemon.
The rival's starter gets up to level 85
in my opinion, torchic or mudkip is the strongest.
Giratina
starter Pokemon
Tortera because is the only starter Pokemon that can learn earthquake witch is powerful.
Chimchar, piplup, and turtwig.
It is a completely a opinion
Pick him as your starter
Piplup
You can get another starter if you get all the sinnoh pokemon. Proffeser rowan will ofer a johto starter.
Pikachu has the most experience in battles and is the strongest starter Ash has.
There isn't one.You can train well,and any Pokemon can be the strongest.But there really is not a strongest Pokemon.