ShounenSuki

I recently learnt that there was a Zygarde cell quest in the game, so I've been using a walkthrough to go through all the cells I missed. So far I've found 88, but the walkthrough says I should be on 91. I'm missing the one next to the help centre in East Gearen, the one in Oceana Pier, and the one in the Gearen Sewers. I'm fearing they might be missable, but I doubt the creator of this wonderful game would be so cruel. Can anyone help me?

How on God's great, beautiful Earth do I defeat this thing? I can't even begin to touch it...

I'm currently at the fight with Geara and Zetta (bloody difficult, btw) and I've started noticing that my Sucker Punches keep failing half the time when they really shouldn't be. Were the mechanics of Sucker Punch changed or is this an error in the coding or something? Please help!

I accepted the Chasehim! mission in Sheridan and went back to Oceana pier as the hint suggested, but couldn't find anything there. When I went back to Sheridan and checked the mission board, it now says that I don't have an active mission and that "This help request has already been answered". Did I just break the game?