I want to have collectibles and trophies on this site like they have on the Cheezeburger Network. On those sites, when you jump from one site in the network to another, sometimes a message will come up and say "Congratulations, you've found a collectible ___," and if you have an account on that network the collectible you found will appear on your user profile. They have all kinds of random things in various categories like food items (carrot, broccoli, etc), things cats like to sleep in (laundry basket, etc), and some things that you can only find at certain times of year (holiday-items and New-Year's Resolutions). It's not like you get a voucher so you can actually get the items in real life, they're just fun to try and find (you can also get them as gifts from other members).
Also, they have trophies you can get that appear on your profile when you accomplish certain things like voting for X number of pictures/videos, posting X number of pictures/videos, making X number of friends, etc. We should have things like that here with creating X number of threads (void if they are spam threads), going X length of time without any infractions, answering X number of questions in advice or Q & A threads, etc.
As for the collectibles, I have a few ideas:
Badges: all of the different badges from the different regions
Pokeballs: All different kinds of Pokeballs
Types: Pictures of popular Pokemon from every type like Pikachu for Electric, Riolu for Fighting, and Shaymin for Grass
Also, as I said, you could give people the ability to give collectibles as gifts or trade them with each other so they can complete the collections from the different categories. That way it would be fine to have doubles of some so you could use them as trade bait.
Next, you could have special collectibles you get for getting certain groups of three or four collectibles from a certain category:
*Get a Pokeball, Great Ball, and Ultra Ball and you get a free Master Ball
*Get multiple Pokeballs, get a Premier Ball
*Get a Safari Ball, Sport Ball, and Park Ball, get a Dream Ball
What do you think? I think it would be really fun.