I prefer the Mach Bike for the extra speed boost but some people find it's too fast and they can't handle the bike well without crashing. It's purely down to your own preference so just try each bike and see which you'd prefer for most parts of your game. But you'll have to go back and change it at some points in the game, because some areas can only be accessed using a certain bike.
The Acro bike.
If you mean the Acro Bike and the Mach Bike, you can't get it in Pokemon Pearl.
use the acro bike
It is very simple, you get it in Mauville City where you get the acro bike and the bike shop. You switch between the two.
you need to get Acro bike then jump sidewards hold down then up then it will start to jump
heres only a bike no acro bike or mach bike
there is no acro bike on Pokemon platinum, you press B to change gears
The Bike Shop...........
you need to go to Mauville to get a bike an Acro bike or a Match bike
Acro Bikes are only obtainable in Ruby, Sapphire, and Emerald.
The Acro bike.
acro bike
Only the acro bike can do tricks.
If you mean the Acro Bike and the Mach Bike, you can't get it in Pokemon Pearl.
use the acro bike
I think a Pikachu from Safari.
The Mach Bike is faster than the Acro Bike, and the Mach Bike allows you to go up slippery muddly slopes whereas the Acro Bike doesn't. Also, although you can ride the cycle path on an Acro, you can only set a record speed on a Mach Bike, because the Acro is much slower/easier to manouvre.