ChatGPT Matchup Summary (Win Condition and Game Plan)
smashwiki frames Bowser Jr. as a trap-oriented midrange character built around Mechakoopa, cannon pressure, and Clown Kart mix, while Roy is a burst-heavy swordfighter whose real reward comes from getting close enough to land the strong hilt hitboxes.
That means Bowser Jr. does not want to play an honest close scramble. The stable version of the matchup is to use items and stage clutter to slow Roy’s dash and jump timing, then force him to swing from less comfortable spacings or commit to the punishable grounded options.
Once Bowser Jr. blocks those unsafe buttons, he should convert immediately into Up Smash, Uair, grab, or Nair, then keep Roy above him or at ledge before the next rushdown cycle starts.
What helps Roy most is making Bowser Jr. panic into close-range trades, baiting impatience into his safer aerial strings, and escaping the ledge often enough to reset another direct burst entry.
Full Move Frame Quick Reference
| Opponent Move | Startup | On Shield | Bowser Jr. OOS Candidate Moves | Barely Missed Moves |
|---|---|---|---|---|
| Jab | 5 | -9/-12 |
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| Forward Tilt | 8 | -13/-16/-17 |
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| Up Tilt | 6 | -21/-25 |
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| Down Tilt | 7 | -3/-7 |
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| Dash Attack | 13 | -17/-21 |
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| Forward Smash | 13 | -27/-29/-32 |
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| Up Smash | 12/15/17/19/22 | -29 |
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| Down Smash | 6/21 | -46/-49/-30/-33 |
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| Neutral Air | 6/15 | -6/-6/-5/-6 |
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| Forward Air | 10 | -4/-5 |
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| Back Air | 8 | -5/-6 |
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| Up Air | 5 | -4/-5 |
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| Down Air | 16 | -9/-10 |
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| Neutral B | 21-260 | -15 to Shieldbreak |
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| Side B | 9 | -26/-16(air) |
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| Up B | 9/11… | ** | ||
| Down B | 8 (Start of Counter) | — | ||
| Grab | 7 | — | ||
| Dash Grab | 10 | — | ||
| Pivot Grab | 11 | — |
Win Condition Checklist
- Use Mechakoopa, cannon pressure, and Cart to break up Roy’s dash and jump timing before he reaches hilt range.
- After blocking Jab, Forward Tilt, Up Tilt, Dash Attack, smashes, Dair, Neutral B, and Side B, take the shortest guaranteed punish first with Up Smash, Uair, grab, or Nair.
- After every punish, keep chasing Roy’s landing or push him to ledge so he cannot restart clean burst pressure.
- Prefer finishing stocks through ledge traps and recovery pressure rather than through center-stage scrambles where Roy’s close hitboxes are strongest.
Actions to Avoid
- Trying to box Roy head-on without setup support and giving him repeated hilt-range openings.
- Swinging into the safer Nair, Fair, Bair, or Uair shield pressure and feeding the exact scramble Roy wants.
- Passing on obvious shield punishes and allowing his grounded burst tools to repeat.
- Letting a cornered Roy return to center for free instead of cashing in on the ledge and recovery sequences where his weakness is clearest.