Ice Climbers (SSBU)/Up smash

Hitbox visualization showing Popo's up smash.

Hitbox visualization showing Nana's up smash.

Overview

Each of the duo performs an outward overhead mallet swing. While it would normally be too slow to be much good as an out of shield option, this problem is lessened for the Ice Climbers, specifically, since the additional lag that comes from hitting two different shields can keep the opponent stuck in place longer than usual, which buys the climbers some extra time to punish. What's more, it hits pretty hard, and covers them on all sides, so it can be made a very respectable out of shield option in situations where the unimpressive speed has been rendered a nonissue.

When landing a grab while desynced, the partner can be made to buffer a smash attack as the leader throws the opponent, greatly enhancing their damage and launch power. Combining an up throw with an up smash turns the otherwise very weak throw into a great kill move, with up-throw-up-smash being their 3rd strongest. A desynced up smash also hosts some combo potential at low to mid percentages if only one climber uses the move, allowing the other to jump up and hit the opponent again. It can also be desynced out of shield and lead to kill-confirms. By inputting an out of shield up smash for a split second and with tight timing, only the partner will use it. The leader can then toss their partner up to hit the enemy again with an up special, although small or medium-sized opponents can escape with DI and it leaves the Ice Climbers helpless for several seconds afterward, making it fairly situational and very risky. Without desyncing, up smash offers no combo capabilities, but it can be comboed into from a down throw at very low percents.

While their up smash is respectable as a pair, it becomes far worse upon isolation. Losing almost half of its damage, and no longer being able to rely on an extra shield to give it leeway on its underwhelming speed. But it does at least work as a better than nothing kill move if it catches someone by surprise.

Hitboxes

Leader

ID	Part	Rehit rate	Damage	SD	Angle	Angle type	BK	KS	FKV	Set weight	Radius	Bone	Offset			H×	SDI×	T%	Clang	Rebound	Effect	Type	G	A	Sound	Direct	Hit bits	Hit part	Blockable	Reflectable	Absorbable	Flinchless	No GFX	Heedless
0	0	0	11.0%	0		Standard	50	105	0		3.0	havel	-0.8	0.0	0.0	1.0×	1.0×	0%							Punch		All	All
1	0	0	11.0%	0		Standard	50	105	0		3.0	havel	-0.8	3.0	0.0	1.0×	1.0×	0%							Punch		All	All
2	0	0	11.0%	0		Standard	50	105	0		4.0	havel	-0.8	7.0	0.0	1.0×	1.0×	0%							Punch		All	All
3	0	0	9.0%	0		Standard	50	105	0		3.0	top	0.0	9.0	0.0	1.0×	1.0×	0%							Punch		All	All

Partner

The hitboxes with a "top" bone have two possible X offsets depending on whether the partner is facing right or left (respectively), preventing issues with the Z-axis.

ID	Part	Rehit rate	Damage	SD	Angle	Angle type	BK	KS	FKV	Set weight	Radius	Bone	Offset			H×	SDI×	T%	Clang	Rebound	Effect	Type	G	A	Sound	Direct	Hit bits	Hit part	Blockable	Reflectable	Absorbable	Flinchless	No GFX	Heedless
Early hit
0	0	0	8.25%	0		Standard	50	126	0		3.0	top	3.0 or -3.0	12.0	4.0	1.0×	1.0×	0%							Punch		All	All
1	0	0	8.25%	0		Standard	50	126	0		3.0	top	3.0 or -3.0	10.0	5.5	1.0×	1.0×	0%							Punch		All	All
2	0	0	8.25%	0		Standard	50	126	0		4.0	top	2.0 or -2.0	7.0	8.0	1.0×	1.0×	0%							Punch		All	All
3	0	0	6.75%	0		Standard	50	126	0		3.0	top	3.0 or -3.0	9.0	0.0	1.0×	1.0×	0%							Punch		All	All
Mid hit
0	0	0	8.25%	0		Standard	50	126	0		3.0	havel	0.8	0.0	0.0	1.0×	1.0×	0%							Punch		All	All
1	0	0	8.25%	0		Standard	50	126	0		3.0	havel	0.8	3.0	0.0	1.0×	1.0×	0%							Punch		All	All
2	0	0	8.25%	0		Standard	50	126	0		4.0	havel	0.8	7.0	0.0	1.0×	1.0×	0%							Punch		All	All
3	0	0	6.75%	0		Standard	50	126	0		3.0	top	3.0 or -3.0	9.0	0.0	1.0×	1.0×	0%							Punch		All	All
Late hit
0	0	0	8.25%	0		Standard	50	126	0		3.0	havel	3.8	1.0	0.0	1.0×	1.0×	0%							Punch		All	All
1	0	0	8.25%	0		Standard	50	126	0		3.0	havel	3.8	4.0	0.0	1.0×	1.0×	0%							Punch		All	All
2	0	0	8.25%	0		Standard	50	126	0		4.0	havel	2.8	8.0	0.0	1.0×	1.0×	0%							Punch		All	All
3	0	0	6.75%	0		Standard	50	126	0		3.0	top	3.0 or -3.0	9.0	0.0	1.0×	1.0×	0%							Punch		All	All
Latest hit
0	0	0	8.25%	0		Standard	50	126	0		3.0	havel	4.8	1.0	0.0	1.0×	1.0×	0%							Punch		All	All
1	0	0	8.25%	0		Standard	50	126	0		3.0	havel	4.8	4.0	0.0	1.0×	1.0×	0%							Punch		All	All
2	0	0	8.25%	0		Standard	50	126	0		4.0	havel	3.8	8.0	0.0	1.0×	1.0×	0%							Punch		All	All
3	0	0	6.75%	0		Standard	50	126	0		3.0	top	3.0 or -3.0	9.0	0.0	1.0×	1.0×	0%							Punch		All	All

Timing

Charges between	7-8
Leader	12-17
Partner (early, mid, late, latest)	12, 13-14, 15, 16-17
Interruptible	50
Animation length	61

Leader
Partner

Legend (1 square = 1 frame)

Lag time

Charge interval

Hitbox

Hitbox change

Interruptible

Ice Climbers's moveset

Neutral attack (1 · 2) · Forward tilt · Up tilt · Down tilt · Dash attack · Forward smash · Up smash · Down smash
Neutral aerial · Forward aerial · Back aerial · Up aerial · Down aerial
Grab · Pummel · Forward throw · Back throw · Up throw · Down throw
Floor attack (front) · Floor attack (back) · Floor attack (trip) · Edge attack
Neutral special · Side special · Up special · Down special · Final Smash