Wifi has a feature that levels all your Pokemon automatically up to Level 100. For that reason, Rare Candies aren't that popular for usage anymore.Rare candies still help. Besides, stones are very easy to get. Fr/Lg, Celadon city, Celadon Dept. store, have pokes hold the stones. Use Pal Park. Easy.
Nintendo hardly ever releases an event where you can actually use the story mode to obtain the event Pokemon. They only would really directly give you the event Pokemon rather than making you use Story Mode to capture it. Plates are hardly considered valuable at all. They barely boost your move's power in competetive.The event items, I guess, like Azure Flute, Oak's Letter, etc. Also one-time evo items, plates & rare berries.
It's not valuable if it's hacked. D: And I would much rather EV train than get experience fast.i personally try to get me a Lucky Egg, i think its 3x amount af exp after a battle. And i use an action replay to get The Azure Flute, Oaks Letter and Members Pass/Card:P