Looking for DLC check this site out. It seems it has the Wipeout Pure add ons
I fully admit one of my favorite games on the PSP is Toy Story 3. Literally grown up on Sonic, and I love the collecting aspect to this game. It too has DLC, mainly a couple of Woody, Buzz Lightyear mini games and a Alien puzzle game. Which is more like getting your 3 aliens from point A to B in as few moves as possible.
With that said the Alien mini game is rather good, and faithful to the movie. The Buzz Lightyear mini games are worth the 99 cents each Sony wants for them. They are both are exciting and very challenging. I absolutely do not like the Woody mini games. There more you can beat them if you memorize all you have to do and frankly they are too easy.
Little Big Planet PSP, being taken off of the Sony store rather surprised me, as it is a very excellent game. I highly recommend getting it. Now for it's DLC which is gone off of the Sony store like the game, if you can find it saved somewhere brings new things to this game. Like when it's server was still up, you could actually download fan made levels. Which was could be accessed through a patch. I also heard it fixed a bug in the game, but I can not confirm this. What actually they had available were free stickers, you could place around the levels and pay outfits for your character. As well as the previously mentioned Fork Lift Mini game.
There use to be a video on YouTube which showed this God awful mess of the fork lift mini game which Sony wanted $5.99 to download. But it has since has been taken down. It really was horrible.
SOCOM: Fireteam Bravo 3
Has 2 add ons
Kommando Spezialkräfte (KSK) Pack [PSP]
which is Download this pack to get your hands on an official KSK uniform and a heavy duty F2000 assault rifle. The F2000 is a formidable weapon that can be tailored for any mission or tactical situation: in the right hands, it can turn the tide of battle.
Special Air Services (SAS) Pack [PSP]
Download this pack to take stock of a complete SAS uniform and an awesome AS-50 BMG sniper rifle. The AS-50 is an unmatched anti-material weapon that can devastate tough targets at long range. Prepare to take out the enemy just like Britain’s finest!
The real irony of this, these add ons were once available to US owners of the game. But not now, you have to live in Europe and have a European copy of the game to get these downloads.From the Sony store there.