Although I do not play Link, I can give you some perspective from a Corrin main like myself.
1. that Corrin had a terrific spacing game.
2. I always found that a Link player can give me a lot of issues by walling me out with projectiles. Corrin has no really threatening projectile, so rather then try to contend against her with your tilts, air and ground game. Try to abuse your bombs to get in.
3. When Corrin used side b to pierce the ground, just move back or shield. The move can beat out most attacks, but it can be punished if you act defensively.
4. Corrins neutral Air is tough to contend with, but if you space yourself out of its range, you can punish her while she's stuck in the full animation, its a long one and throwing a bomb at her while Corrins in it can be a real set back. Its also not safe on shield. So you can often punish Corrin with a shield grab.
Hope this helps!!!!
