This will be a series where I give you some tips, tricks, and tidbits about a certain boss, one for each post. Except this post will have more than one boss, Don't question it.
Goopy Le Grande: Goopster The Big is one of the easiest bosses to S-Rank. No thought required. Use whatever, just remember you need to parry all three question marks!
The Rook Pack: Easiest boss in the game if you don't count king dice battles. Don't kill the first phase too fast to get your parries in. I'd recommend getting the secret phase, as the onion might catch you off guard. Please don't bring Lobber to the final phase.
Cagney Carnation: Cagney Carnival's first phase is the only hard part. If you have the DLC, you should be using Converge for this. Roundabout or Spread could work if you don't have it. Once you've beaten the first phase, don't let your guard down. You could still get hit. Alternatively, you can use Crackshot and stand in the corner aiming upwards in the first phase.
Was going to cover all Isle One bosses, but this post is getting too long. Next post.