Item description:

Metroid Prime:

Missing 8% from Log Book (thus, a Silver Credit)

Metroid Prime 2:

Missing 9% from Log Book

Metroid Prime 3:

Missing 19 Yellow Credits as follows.

Save all 12 Demolition Troopers at Pirate Transit Station 0205
Defeat 18 bosses on Hypermode difficulty (one credit per boss)
Missing one Friend Voucher
Escape from Meta Ridley as Morphball without taking damage (optional as there are more than enough Friend Vouchers in the game)