Platform Drop

In Smash 6, pressing Down+Jump will cause the character to drop through a soft platform. It uses the 3 frame jumpsquat window to determine if the character should drop through the platform. Short Hop Down-Air has priority over dropping through the platform if the attack button is pushed. This is particularly useful during the character’s Initial Dash, Run, or Out of Shield.

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Notes

This helps the game feel a smooth and responsive, and the player won't feel stuck when running on soft platforms.