1.  **Round 1:** 128 matches.  Each match winner advances.
2.  **Round 2:** 64 matches. Each match winner advances.
3.  **Round 3:** 32 matches. Each match winner advances.
4.  **Round 4:** 16 matches. Each match winner advances.
5.  **Round 5:** 8 matches. Each match winner advances.
6.  **Round 6:** 4 matches. Each match winner advances.
7.  **Round 7:** 2 matches. Each match winner advances.
8.  **Round 8 (Championship):** 1 match. The winner is declared champion.


**Detailed Bracket (Illustrative -  Too large to fully display here):**

A full bracket for 256 participants would be extremely large to display textually.  However, the structure is consistent.  Each round halves the number of participants.  Seed 1 plays against seed 256 in round 1, seed 2 plays against seed 255, and so on.  The winners advance to the next round, maintaining their relative position (though not necessarily their seed number after the first round).  This pattern continues until a single champion remains.  To visualize this, consider using a bracket generator tool (many are available online) and inputting 256 participants.  The tool will automatically generate the complete bracket structure.  Since all participants win all matches in this scenario, every participant would advance through each round until the final match.  The final match would be between two participants who won all their previous matches.  The winner of the final match would be arbitrarily determined as the champion.