**Mega Charizard Y ex (Ascended Heroes) faces downward pressure heading into August 31, with traders assigning an 80.5% implied probability to a price decline.** The primary driver is the August 28 release of the official Mega Evolution—Ascended Heroes Tin, which directly adds fresh supply of cards from the same expansion just days before the market snapshot. This follows a sharp July correction where one hyper-rare variant already fell more than $100 amid rising listings and softer demand. Broader 2026 market dynamics reinforce the consensus: post-release hype for the Mega Evolution line has cooled, with multiple Charizard ex variants showing softening secondary-market prices as collectors shift focus to newer product drops. The nearby First Partner Illustration Collection Series 3 (August 7) has further diverted attention and spending. While Charizard remains a cultural staple with strong long-term collector interest, the immediate supply influx and recent sales data point to continued short-term softening rather than a rebound by month-end.