I have a quest that says to give Nero 2 bubbles to fill his power ball. Have completed several levels since and not moved forward with this quest at all
I was having trouble with this too. All you have to do is put your cursor over where Nero is standing and click on him, and it will give him bubbles to fill the power ball and will complete the quest. hope this helps.
Hi Jean, to fill Nero's power ball you give/shoot your bubbles to Nero's orb to fill it up more quickly. This video shows you how to do it:
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