*sees a character/media bracket post* i must not vote arbitrarily for the one i know. I must not bias this poll any further on pure popularity. I must consider the other side
*sees mutual tags telling me who to vote for* right away captain
Gold Forte Burst (Cure Sunshine, Heartcatch Precure)
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Sunshine's my fave so there's some bias... but it's just a genuinely fun attack! Much like her transformation, her attack has a lot of joy in it that makes it all the more exciting... plus who doesn't love a good over-the-top anime missile burst? Especially one made of flowers!
Let's be real how often do you see a magical girl nuke it from space?
Heartful Beat Rock (Cure Beat, Suite Precure)
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She attacks with a guitar that is also an axe and also a gun. It's ridiculous. I love it.
Happiness Hurricane (Cure Passion, Fresh Precure)
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The particular use of happiness as a theme is really, really good for this particular character. Also its BGM is one of my favorite tracks in the franchise.
ALL of Miracle and Magical's attacks are pretty great (and I love duo/team attacks in general), but the full moon backdrop and sparkly water effects are just the BEST.
Honorable mentions are March Shoot (incorporating her soccer skills into her magical girl life!), Wing Attack (the Littlest Guy wins via body slam), Lovely Punching Punch (it's funny), and any time one of them just kicks the living shit out of a monster.