If you mean, de-evolutionary items, they don't exist. However, a Pokemon CAN hold an everstone, which prevents evolution (while holding it).
Pokemon Ruby has Pokemon that Pokemon Sapphire does not and Pokemon Sapphire has Pokemon that Pokemon Ruby does not.
So far, the only way to get Deoxys in Pokemon Platnum (or in any Pokemon game for that matter) has been through Nintendo events.
There is no Pokemon mansion in sapphire.
He is not in Pokemon: Sapphire. You will not be able to find him. He is in Pokemon: Diamond, Pokemon: Pearl, and Pokemon: Platinum. You will definitely have trouble finding him in Pokemon: Sapphire.
Evee is not availiable in Pokemon Sapphire.
Any Pokemon in sapphire but you have to migrate
sinnoh Pokemon won't appear in Sapphire version!
You cannot get Regigas in Pokemon Sapphire as it is from the next generation of Pokemon
All Pokemon in Pokemon sapphire can breed. Except for all legendaries.
all you hav to do is go to game stop, and they will have a ds download play and you use your ds, and then you will receive it
Not in sapphire.
There is not a bike voucher in Pokemon sapphire