The moves that Politoed can learn via level up in Pokémon Platinum include ones such as Bounce, Hyper Voice and Swagger however the only level-up moves that the Move Relearner can re-teach Politoed are Bubblebeam, Doubleslap, Hypnosis and Perish Song.
no.
The same as in diamond &pearl
Yes he can. For example, he can learn the TM Ice Beam.
You can trade them to the move tutors so that your Pokemon can learn different moves.
Go to serebii.net and TADAA!! you will see what you were searchin for
if it was Pokemon platinum dialege leans arua sphere at level 92
all i know is mach punch and flame wheel and taunt
shards can be used to trade with other people. in return, they may teach your Pokemon moves. there are 3 move tutors in Pokemon platinum that will teach your Pokemon moves in exchange for shards in a specific color.
Arceus does not require an item in order to actually learn Grass-type moves, however it can be given the Meadow Plate in order to boost the power of these moves by turning it into a Grass-type Pokemon.
The best team in pokemon platinum is an Infernape, Staraptor, Luxray [third evolution of Shinx], Floatzel, Bibarel [make it learn all four moves as HMs] and Giratina.
Crush is a field move, exclusive to Pokemon Ranger. You may be looking for Crush Claw(sorry if your not!). A good site to see which moves Pokemon can learn is http://www.serebii.net.
go to the old mans house on route 228 he will teach starter Pokemon powerful moves