Games : How do I counter Sonic?

On Super Smash Bros 4 (SSB4), I am a decent player. Winning some matches, and loosing others. But, I seem to loose most of matches against a Sonic, unless the player is all around bad. I find it difficult to hit them while they spam their Side + B and their basic B. Is there anyway to counter it effectively?

I mainly play as Ganon, Falco, Captain Falcon, Ike, Ness, and Little Mac.