on Pokemon pearl/dimand/platinum u only need to see 37
After fighting the red Gyarados at the Lake of Rage, you will get a Red Scale. You need to take this scale to Mr Pokemon on Route 30 (North of Cherrygrove City). He will trade the Experience Share item for your Red Scale.
After delivering Steven the letter from the president of Devon corp visit the president and talk to him to receive the Exp share.
fainting the opposing Pokemon (I think you need to look at the related link below to)
It needs to be in your team to receive Exp but it doesn't need to battle. It also needs to be alive.
well first you need the fifty Pokemon then go to the house on the right go upstairs and ask for it from the aide
i know this answer it is THAT U NEED TO ANSWER AND DO IT ON YOUR OWN
An oak aide in a big building east of fuchsia city has exp share you need to record 50 Pokemon in your pokedex and show him that, he gives you exp share for your accomplishment.
Because you don't need the red scale, and you probably could use an exp share.
you need 200 Pokemon to fill the whole pokedex
i am but do i need to have wi fi ? cause if i do i cant mate?
you need to find 210 Pokemon to complete the pokedex
You have to deliver the letter to Steven in Dewford, then you should go back to the president in Slate-port city where he will thank you for delivering the letter and rewards you with the EXP-Share.