Second boss... (spoilers)

[hyouko]

So.  Am I missing something?  I've worked out that I probably need to create the... uh, exploding gremlin-type-things, and lure them towards the boss while he's doing his vacuum-cleaner move.  Trouble is, they don't seem interested in following me - they just swim back and forth endlessly.  How do I get them to budge?

[chiablo]

Try singing some songs to them.

[shinygerbil]

It's definitely possible to actively interact with them. Keep trying and you'll get it

[dhakkel]

Just fyi, this guy doesn't have to be the second boss. I left him for ages and ages by complete accident.

If you do find him too hard, you are always free to come back later.

[Citrus]

I've just been shooting at his head until I die. Oops.

[shinygerbil]

Don't worry, quite a lot of people did that.