Rusty's Real Deal Baseball [3DS]
Most clothing is unlocked by getting A Rank in the Hi-Score Derby modes. All clothing can be color customized by using the shoulder buttons (by default it's your Mii's shirt color).
Cloth How to unlock
Basic Uniform Get an A Rank in Bat & Switch's Hi-Score Derby A.
Business Suit Get an A Rank in Bat & Switch's Hi-Score Derby B.
Ninja Suit Get an A or A+ Rank in Bat Master.
Rusty Slugger Jacket Purchase all 10 of Rusty's games.