I usually take out Frigate or anything that has a lack of platforms, against Yoshi. Yoshi's ability to punish landings in this matchup is far, far better than ours. You don't want to land anywhere near him, and platforms make it a lot easier on you. Also, Yoshi landing on platforms is great for us, as it's easy for us to keep pressure on him on them, since his options are limited on it. So for the ban, anything between Frigate, FD, SV, and Rainbow Cruise, imo. For Counterpicks, I usually prefer Battlefield and Lylat.