LogFAQs > #914134729

I don't think there's a universal answer. You have to look at the dps and energy gain of their basic moves, the energy efficiency of their charged moves, and their HP.

Community day moves tend to be powerful/efficient. Beyond that I don't know offhand, but I saw a Reddit spreadsheet of various moves' efficiency for pvp. Don't have the link atm on mobile.
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You put your RESOLVE HAT back on, which conveniently is the same hat as your NORMAL HAT.
{Drakeryn}