In this case it doesn't matter because I consider the 'hit' action of Dig to deduct the 9 Energy, because that would be more strenuous than actually digging itself.
In the case where it would have mattered I would have first consulted my tutor. Apologise for the confusion.
Edit: It seems you are sadly mistaken. Staying underground costs 3 Energy per action, or 2 Energy due to Gible being a Ground type. Please read Dig's description next time.
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