Link doesn't really seem to have a lot of approach options, and his combo game is fairly weak. You can use A combo canceling, but that isn't really too great and it's a really obvious set up.
He can space with zair and keep up a projectile wall, but once the opponent reads that again, it's really easy to counter. His dair is also obvious and only spikes the first few frames so you need to get right up on them. Bombs are pretty much the only way to set Link apart, tossing a bomb up into a d-throw or something similar.
Poll