Mr. Stone's Project #88

Market structure summary: Over the last 7 days, prices have remained stable at 0.0%, indicating a consolidation phase over sudden breakouts. With a 22% 90-day spread ($0.65-$0.83), this card currently tracks as moderate-volatility.

Relative to the 30-day baseline ($0.80), pricing is near equilibrium. Top-grade copies show substantial separation from raw: PSA 10 is pricing +46774% above the current raw benchmark.

PSA 9 is currently around $32.89, while PSA 10 is $374.99.

Current market pricing for Mr. Stone's Project (Holon Phantoms) sits near $0.80.

Week-over-week change is limited (0.0%), indicating short-term stability. Relative to the last 30 days, value is near baseline at $0.80.

The 90-day window shows a floor near $0.65 and a peak around $0.83 (22% total spread), which maps to moderate-volatility movement. This version is categorized as Uncommon.

Mr. Stone's Project is a Holon Phantoms card from the 2006 release window.

Its card type is Trainer. The rarity label is Uncommon.

It carries a Supporter subtype designation. The card text reads: You can play only one Supporter card each turn.

When you play this card, put it next to your Active Pokémon. When your turn ends, discard this card.

Release year for Holon Phantoms is 2006. It belongs to the EX series.

The checklist contains 111 cards, placing it in a mid-size expansion range. As of 2026, the set is 20 years old and fits a legacy-era profile.

Within this set, Mr. Stone's Project is card number 88 with a Uncommon designation.

Mr. Stone's Project sits within a broader pool of Mr.

variants that can be compared by set, rarity, and price. This comparison sample includes 2 alternatives across 2 sets.

In this sample, pricing ranges between $1.32 and $1.95 (48% total span). Relative to the alternative average ($1.64), this card is -51%.

Notable alternatives include Mr. Stone's Project #79 (Emerald) at $1.95 and Mr.