Step 1: avoid chain grab by either camping the platform, or camping the sides. Going for risky dtilts/ftilts that arent even safe on hit= getting cg'd.
Step 2- Jump alot. You can minimize the damage you take by forcing falco to hit you with only lasers and nair. If ur on the ground, dacus will **** you so quickly.
3. Bait side B. Alot of players for some reason can not do this. As most falco players tend to jump into auto pilot, its easy to get them to side B. Condition them and punish.
Also, I believe SV is the worst stage for this matchup...so ban it.
Dk lives longer on fd, has less of a chance of getting spiked from cg, the stage can gimp falco, and all around adds an increase in Dk's movement.