I used to get mad at the first one, and I think I traded it in, if I did own it, at some point. For some reason getting a new DS Lite the other day inspired me to give Trials n TRIBBLES a try, but on the way home when I stopped to get the new Pixar film, I found the second game new for 20.
So I havent even started the third game but I had never played the second game, but so far Justice for All is a great bit of fun and IMO the first case was much more fun than the first case in the first game. Im on the second case and the characters are pretty awesome.
In short, im glad I gave it another shot, cause im luvin it so much I may pick up the first one again and give it another go for great justice.