Rillaboom #SWSH277

For Rillaboom in SWSH Black Star Promos, the current reference price is $0.44. Price action is stable over 7 days, moving only 0.0%.

It now sits 3.3% above its 30-day average of $0.43. The 90-day window shows a floor near $0.41 and a peak around $0.45 (9% total spread), which maps to low-volatility movement.

The listed rarity for this print is Promo.

Collector-focused market read: Weekly drift is minimal (0.0%), indicating a relatively balanced short-term market. Observed 90-day bounds of $0.41 and $0.45 create a 9% band, matching a low-volatility profile.

Versus the 30-day average ($0.43), the card is trading 3.3% higher. Without a consistent graded comp in the current snapshot, live listings are still required for reliable condition-based valuation.

Rillaboom appears in SWSH Black Star Promos, released in 2019. The printed flavor text states: "The one with the best drumming techniques becomes the boss of the troop.

It has a gentle disposition and values harmony among its group." Its card type is Pokémon. The rarity label is Promo.

Printed HP is 180. Energy typing is Grass.

As an evolution, Rillaboom develops from Thwackey. Notable move text references "Wood Drain" and "Raging Repeated Strike".

Rillaboom sits within a broader pool of Rillaboom variants that can be compared by set, rarity, and price. The current sample spans 6 comparable cards from 6 sets.

In this sample, pricing ranges between $0.21 and $6.32 (2910% total span). Relative to the alternative average ($2.64), this card is -83%.

Notable alternatives include Rillaboom #SWSH006 (SWSH Black Star Promos) at $6.20, Rillaboom #18 (Chilling Reign) at $0.25, Rillaboom #SV006 (Shining Fates Shiny Vault) at $2.56, and Rillaboom #13 (Shining Fates) at $0.21.

SWSH Black Star Promos entered circulation in 2019. SWSH Black Star Promos is grouped under the Sword & Shield era.

Set size is 304 cards, which categorizes SWSH Black Star Promos as very large. As of 2026, the set is 7 years old and now falls into an established back-catalog period.

Within this set, Rillaboom is card number SWSH277 with a Promo designation.