How to Kill the SbamBam Boss
I assume everyone knows SbamBam, the first actual frog boss Redgi fights in the story, at the village gates.
My advice is take your amor off, it is much easier against him and keep a distance.
If he make a red circle attack you need to be far from him that he will not reach you with a jump and then you can double dodge his strike chain.
He does 2-3 red circle attack chain and after that pretty much he does normal red attack that you can easily dodge and attack his back.