| Pokémon TCG Houndoom EX Holo XY Breakthrough 21/162 | $3.00 USD | raw | - | - | 4/5/2026 |
| Houndoom EX 21/162 Breakthrough Holo HP-DMG | $2.00 USD | raw | - | - | 4/4/2026 |
| 2015 POKEMON XY HOUNDOOM EX BREAKTHROUGH RARE CARD #21/162 - LP | $4.33 USD | raw | - | - | 4/2/2026 |
| 2015 Pokemon - XY: Breakthrough Houndoom EX #21/162 Holo | $6.50 USD | raw | - | - | 4/1/2026 |
| Houndoom EX 21/162 BREAKthrough NM Ultra Rare Pokemon Card | $12.99 USD | raw | - | - | 3/30/2026 |
| Houndoom EX #21/162 Pokémon Breakthrough Holo | $6.99 USD | raw | - | - | 3/30/2026 |
| Houndoom EX Ultra Rare XY - BREAKthrough BKT Fire Holofoil 21/162 NM | $8.76 USD | raw | - | - | 3/29/2026 |
| Houndoom EX Ultra Rare Breakthrough 21/162 NM | $6.99 USD | raw | - | - | 3/29/2026 |
| Houndoom EX Ultra Rare XY - BREAKthrough 21/162 LP/NM | $1.10 USD | raw | - | - | 3/27/2026 |
| Houndoom EX 21/162 XY - BREAKthrough - Pokemon Card - NM | $6.26 USD | raw | - | - | 3/26/2026 |
| Houndoom EX 21/162 Ultra Rare XY - BREAKthrough Pokémon Card | $7.99 USD | raw | - | - | 3/25/2026 |
| Houndoom EX - 21/162 Pokemon XY Breakthrough - Holo NM | $7.00 USD | raw | - | - | 3/25/2026 |
| Houndoom EX 21/162 Breakthrough Ultra Rare Holo Basic HP170 Beast Pokémon TCG | $2.99 USD | raw | - | - | 3/23/2026 |
| Houndoom EX 21/162 BREAKthrough NM Ultra Rare Pokemon Card | $5.99 USD | raw | - | - | 3/22/2026 |
| Houndoom EX - 21/162 - Pokemon Breakthrough XY Ultra Rare Card NM | $7.91 USD | raw | - | - | 3/21/2026 |
| Houndoom EX - 21/162 - Ultra Rare - XY Breakthrough | $1.80 USD | raw | - | - | 3/20/2026 |
| Houndoom EX Ultra Rare XY - BREAKthrough 21/162 NM | $8.09 USD | raw | - | - | 3/18/2026 |
| Houndoom EX Ultra Rare XY - BREAKthrough 21/162 LP | $6.70 USD | raw | - | - | 3/16/2026 |
| Houndoom EX 21/162 Breakthrough Holo | $3.98 USD | raw | - | - | 3/16/2026 |
| Houndoom EX Ultra Rare XY - BREAKthrough 21/162 MP | $5.24 USD | raw | - | - | 3/15/2026 |