kupo15
Smash Hero
There is another option against the head height side b that many over look and its super easy if you are used to it. DUCKING! lolThe illusion at head height is something that ganon's metagame hasn't caught up to quite yet. Pp and mango do it a lot and I pretty much never see it punished properly. They go just high enough so that jab's hitbox won't connect. Yay did it to you first game. We gotta start using that up-angled ftilt more imo.
If you crouch, the side b should go right over your head. Its not crucial to always punish a side b directly (although the reward is greater of course) but if you aren't positioned to do so then trying anyway is a lost cause. His side b has tons of lag from that head height which should give you plenty of time to catch up.
Here is a good idea, duck the side b, punish with the 2nd kick (only) of the dsmash. Doing so will send them back off stage at a low angle backwards