I play Mac. He plays ROB. The projectile game to get in against ROB is hard already, but ROB has fast enough normals, a good grab, and a strong gimping game, so it's a pretty bad matchup for Mac at any distance.
I went 1-2 overall. 2-0'd the Pikachu I met in 1st round Loser's, then was 2-0'd against a keep away Link after I switched to DeDeDe, not knowing he plays a lot with a DeDeDe main until after I lost.