I think u get it at sunshore city. In a house there will be a women who gives u a badge when keeping her company. Keep going there till u receive
Max out your Pokemon's EVs.
== To get the effort ribbon is simple. All you need to do is max out your Pokemon's effort values(EVs), this can be done by fighting a lot of Pokemon or done more quickly using different items and with Pokerus.
Blackthorn City in Johto. A lady in a hut will give your Pokemon the ribbon if it has worked hard.
When you get the Effort Ribbon, it means that the Pokemon has gotten all the 510 EVs (effort value points) available. When you use rare candies you dont get EV. So the connection is that if your Pokemon has the Effort Ribbon you can use rare candies without loosing out on EV points.
pito
you need ten ribbon to be a Pokemon diamond pearl
There isn't much of a way to get an effort ribbon put on a Pokemon except by raising it. Pokerus helps by toughening it up. That way, it raises the stats (also known as IV's). Eventually, you can go talk to the ribbon girl at the Sunyshore market (not Julie the daily ribbon girl) and she'll reward your Pokemon!
10
The effort ribbon will be given to you when the effort values (EV) of the first Pokemon in your party are full. For more info about EV's check this guide: www.gamefaqs.com/ds/946308-Pokemon-platinum-version/faqs/56146
the first Pokemon in your party must have ten ribbons on it.
the ribbon syndicate but to get in there you have to get 3 great ribbons to get into there
Same as in Pearl and Diamond, Pastoria City.