Bridge to the Turnabout / Karei Naru Gyakuten (JP)
During the first day of investigation, you will be playing as Miles Edgeworth and you need to listen to Larry's 2 childhood tales between him & Edgeworth.
1. At any time during the first of investigation, present the Attorney Badge to Larry : he will tell you that it was young Edgeworth dream to become a defense attorney.
2. When Larry is at Heavenly Hall, examine the flags : Larry will say that Edgeworth was so bad doing origami at elementary school.
If the achievement did not unlock at this point, present every evidence & profile to Larry before breaking his psyche-locks.