You can trade from the GTS or from someone else.
If you have action replay on platinum you can capture your rivals
Either pick Chimchar at the beginning and evolve it up or maybe use an action replay.
only with action replay!!! there is no way without action replay
You use an action replay.
no
In diamond and pearl to get you would need a action replay... but in platinum you don't.
You can't get the Secret Key in Pokemon Platinum without Action Replay, unfortunately. You can get Action Replay from most major websites.
just use a action replay
no, not on diamond and pearl sorry. it's only on platinum. on platinum you can do it without action replay
you have to trade/migrate it from a different game that has a deoxys or buy a action replay
You cant you have to buy action replay
You need action replay!!