ChatGPT Matchup Summary (Win Condition and Game Plan)
Mii Swordfighter is unusually variable here because the matchup can swing toward projectile camping or sudden burst entries depending on the chosen specials, and Bowser Jr. gets punished hard if he guesses the wrong layer too long.
That is why Mechakoopa matters as a scouting tool as much as a damage source. It buys the time needed to confirm the recovery, the side special, and the projectile rhythm before committing cart angles or deeper stage takes.
The table shows that Up B (3), Down Smash, Up B (2), Up B (1), and Forward Smash all leave clear punishes for Up Smash, OOS Uair, Grab, and OOS Nair, so the big lag windows should always become corner carry.
For the safer aerials, swinging immediately is usually worse than waiting for the landing or drift-out. Once the loadout is known, stage control matters more than a flashy punish.
Full Move Frame Quick Reference
| Opponent Move | Startup | On Shield | Bowser Jr. OOS Candidate Moves | Barely Missed Moves |
|---|---|---|---|---|
| Jab 1 | 6 | -9 |
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| Jab 2 | 6 | -12 |
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| Jab 3 | 6 | -26 |
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| Forward Tilt | 10 | -16 |
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| Up Tilt | 8 | -17 |
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| Down Tilt | 5 | -6 |
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| Dash Attack | 9 | -18 |
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| Forward Smash | 15 | -34/-34/-33 |
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| Up Smash | 11/14/21 | -32 |
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| Down Smash | 7/15 | -38/-28 |
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| Neutral Air | 10 | -5 |
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| Forward Air | 12/16/21 | -10/-9 |
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| Back Air | 10 | -4 |
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| Up Air | 11 | -4/-6 |
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| Down Air | 14… | -11 |
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| Up B (1) | 13/42 | -37 |
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| Up B (2) | 15/19/22/25/28/31/34 | -38 |
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| Up B (3) | 8 | -57 to -53 |
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| Up B (4) | 8/16/22/26/31/38/47 | ** | ||
| Grab | 6 | — | ||
| Dash Grab | 9 | — | ||
| Pivot Grab | 10 | — |
Win Condition Checklist
- Use the opening exchanges to confirm the up special return path and whether the side special is a burst threat before leaning on cart timing.
- After stopping Up B (3), Down Smash, Up B (2), Up B (1), or Forward Smash, add Mechakoopa or cannonball pressure behind the punish so the escape lanes stay narrow.
- On Neutral Air, Back Air, or Up Air, wait for the landing tile or air-dodge exit and put Up Smash or Uair there instead of mashing first.
- Once the recovery route is understood, keep the edgeguard mostly onstage and let Bowser Jr.’s traps do the finishing work.
Actions to Avoid
- Repeating Clown Kart before the loadout is even understood and getting hard-countered by the exact special you failed to check.
- Sitting in shield forever at sword tip range and never reclaiming the space needed for your own setups.
- Leaving the stage before the recovery type is confirmed and donating Bowser Jr.’s clown-car exposure instead.
- Spending your whole punish trying to kill immediately instead of rebuilding the trap sequence that actually wins this matchup.