Update: I was unfortunately not aware of Shamus Young's severe criticism of Fallout 3 available here to link in the original piece and I regret that. It dovetails rather nicely with what I've written and it's much better executed than my piece. I strongly recommend anyone...
The Good: Great graphics, good sense of humor, torturing enemies is fun
The Bad: Unforgiving difficulty, collecting lives is impossible
Wild 9 is developed by those wonderful guys as Shiny who made Earth Worm Jim and MDK. First off, forget the story. The whole story is told in a three pages in the booklet.
You play this kid who has this thing on his arm and it releases this energy that can grab enemies an smack them around. You're actually supposed to torture enemies such as throwing them in giant grinders, spike pits etc. You also have to sometimes throw them in a spike pit and use them as stepping stones, it's very funny.
The graphics are really good for a PS1 game with bright colors, and smooth textures. You can collect coins for extra life, but I found this impossible. There are 99 in each level and you have to get every single one to get another life. So, if you run out of lives you'll be restarting the level constantly. The game is very unforgiving, but if you're good at these games you won't mind. The game controls very well and isn't slippery, unresponsive for slow. Everything is quick and simple. So, if you want a good platformer for your PSP or your PS2, or hey! Even your PS3 pick up Wild 9.