boss tricks: bomb guardian
Take a few steps up-left while mashing L. As soon as you lock onto his tail, dash left and hit it with a fully charged shot, then uncharged shots until he becomes vulnerable. Use a partially charged shot on the mouth followed by a fully charged shot. He'll take the damage from both if you're fast.
Repeat all of this to finish him off the next time the mouth becomes vulnerable.
- Bomb Guardian has the same amount of health on hard (including the tail).
- For this to work, there are certain percentages of his health bar that you have to avoid bringing him to, otherwise the mouth won't stay vulnerable for a second shot. Try to release charged shots near the same time as the video. The partials are the ones that matter; you can overcharge fulls and still hit him in time.