**Phantasmal Flames booster boxes currently trade near $390–400, reflecting sustained collector demand for the Mega Evolution series’ standout Mega Charizard X ex amid a broader Pokémon TCG bull market.** Released in November 2025 as a compact set, the product saw post-launch softening before rebounding sharply on the chase card’s appeal and sealed-product scarcity. With the market at an even 50% implied probability for an increase by September 30, traders are weighing continued momentum from high-profile singles and investor interest against the imminent September 16 launch of the Pokémon 30th Celebration set. That anniversary release is expected to redirect attention and buying power toward fresh product, potentially creating short-term pressure on mid-cycle expansions like Phantasmal Flames. Additional variables include typical late-summer retail restocks, any reprint signals from The Pokémon Company, and overall secondary-market liquidity heading into fall. The tight odds underscore how quickly new-set hype or supply shifts can tip sealed prices in either direction before month-end.