Titles are collected by going through Story, Tournament, Survival, and Free Battle modes. There's 551 titles to earn in the game. You'll have to unlock around 440 titles in order to get this achievement. After you've finished up all other game modes you'll have quite a few more to unlock in order to get this achievement. You can play online and earn some titles that way as well. Also to get some titles/info card images at the same time is to do this:
1. Go to Free Battle
2. Vs Com/2P
3. Team Match
4. Pick Naruto as Main, and Gaara as Support. You should see a title along the support characters name saying "Those Who Know Loneliness". Pick Gaara again and he'll be your only support character.
5. Win Match and go back to character select
6. Pick another group like that.