Yu-Gi-Oh!

World Championship 2004: GBA Promo

6cards measured at daily market closes. Prices here are each card's typical market price, not live listings. As of 2026-07-06.

Measured activity

Valkyrion the Magna Warrior (Unlimited)made the set's biggest measured move, -50% to $75.00. 5 cards broke away from the set's shared move over the measured window, busier than most Yu-Gi-Oh! sets (83.3 per 100 cards vs. a 23.8 median). 2 moved up, 3 moved down.

How Yu-Gi-Oh! sets usually behave

Value concentrates hard: across 481 measured Yu-Gi-Oh! sets, the single top card typically holds about 13% of a set's total card value.

New sets have typically eased about 23% more than the market overall within 30 weeks of release, fastest in the first few weeks.

Named moves in this set

The set's largest single-card departures from its own shared move.

  1. -50%Valkyrion the Magna Warrior (Unlimited)one active week$75.00 2025-06-09
  2. -40%Sinister Serpent (Unlimited)one active week$57.49 2025-02-24
  3. -38%Harpie's Feather Duster (Unlimited)one active week$82.51 2025-03-03
  4. +31%Kinetic Soldier (Limited)$8.30 2025-05-26
  5. +30%Slate Warrior (Limited)$3.40 2024-07-01

“One active week” means the price changed at the daily market close in only one week of the move window. A single-week jump on an otherwise flat quote can be a stale price rather than a sustained move.

Source: daily market-close consensus prices. Sets with live listing pages carry those separately, this page never mixes the two.