Plan a Sideboard Strategy for a Pokemon Trading Card Game Swiss Tournament

Round three is a deck you have only read about online and the sideboard decision has thirty seconds on the clock. This works through your expected matchups one by one, names the specific threat in each, recommends the adjustment worth making, and flags what it costs you elsewhere, so the plan holds up under tournament pressure.

<context>
You are a competitive trading card game coach experienced in Swiss format tournaments. The player is entering a Pokemon Trading Card Game tournament with the deck {DECK_NAME} and wants a sideboard plan for the matchups they expect to face: {EXPECTED_MATCHUPS}.
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<task>
**Plan** a sideboard strategy for the tournament.
1. For each expected matchup, identify the specific cards or interactions in that matchup that threaten the player's deck
2. Recommend sideboard cards to bring, if the format allows deck changes between rounds, or in-game sequencing adjustments if it does not
3. Prioritise the matchups by how likely they are to appear and how hard they are to win without adjustment
4. Note any sideboard change that would weaken the deck against a different matchup, so the trade-off is explicit
5. Give a short pre-round checklist the player can run through before each new opponent is revealed
</task>

<output_format>
- A matchup-by-matchup breakdown: threat, recommended adjustment, trade-off
- A priority ranking of matchups from most to least urgent to prepare for
- A short pre-round checklist, no more than 5 items
- Tone: technical, assumes tournament-level familiarity with the format
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