I see. What's the main reason this occurs? Rage and momentum stuff?
Brawl Usmash: dust cloud size 5.0 at frames 12-13; 14% hitboxes size 4.9 at frames 12-17
Smash 4 Usmash: dust cloud size 5.5 at frames 13-14; 13% hitboxes size 5.8 at frames 13-17
Smash 4 Possibilities:
- If your opponent gets hit by the dust cloud at its maximum horizontal range -- by the time they get over to the main hitboxes, it's frame 18 now and the hitboxes are gone.
- They were launched on frame 14 instead of 13 and by the time they get over to the main hitboxes, it's frame 18 now and the hitboxes are gone.
- So the dust cloud knockback angle is 125°. If your opponent gets hit by the dust cloud at its maximum horizontal range and DI's up (making their knockback angle 115°), they'll either miss the hitboxes they were being sent towards or hit the Tipper instead. Missing the main hitboxes are pretty unlikely because Brawl's smaller size 4.9 main hitboxes did fine. I'd bet more on the active frames issues I mentioned.
Why was it rarer in Brawl?
- The dust cloud came out on frame 12 in Brawl but Usmash was still active until frame 17 -- so there was more time for your opponent to get to the main hitboxes before they "expired"
- Less horizontal range means they are closer to Marth already when they get hit
- It's possible that the dust cloud had a different knockback angle