Power Keepers

Highest value first. Raw = ungraded, near mint. A dash means no second reading yet.

Card	Rarity	Raw	1D	30D	Trend	PSA 10
Phoebe's Stadium 79 Reverse Holo	Uncommon	$4.07	+3.6%	+3.6%		$150
Great Ball 77 Reverse Holo	Uncommon	$4.02	+0.2%	0.0%		$312
Gardevoir 9	Rare Holo	$4.00	+14.3%	-44.6%		$1,225
Professor Birch 80 Reverse Holo	Uncommon	$4.00	—	—		$138
Glacia's Stadium 76	Uncommon	$3.99	0.0%	0.0%		$71.60
Glacia's Stadium 76 Reverse Holo	Uncommon	$3.99	0.0%	0.0%		$436
Dusclops 14 Cosmos Holo	Rare	$3.96	0.0%	+13.1%		$4,999
Metal Energy 88 Reverse Holo	Rare	$3.84	-0.3%	+9.7%		$116
Multi Energy 89 Reverse Holo	Rare	$3.71	+0.3%	+4.2%		$181
Pikachu 57	Common	$3.67	-8.0%	+5.2%		$260
Fighting Energy 108 Holo	Rare Holo	$3.60	—	—		$89.16
Energy Recycle System 73 Reverse Holo	Uncommon	$3.49	—	—		$100
Drake's Stadium 72 Reverse Holo	Uncommon	$3.42	-7.3%	+0.9%		$55.50
Mightyena 18	Rare	$3.39	+114.6%	+114.6%		$1,568
Metal Energy 88	Rare	$3.39	+21.9%	+21.9%		$62.00
Steven's Advice 83	Uncommon	$3.20	—	—		$110
Mawile 17	Rare	$3.06	0.0%	+2.0%		$72.56
Magneton 16	Rare	$3.02	+134.1%	+96.1%		$549
Poochyena 58 Reverse Holo	Common	$2.99	-13.6%	+5.3%		$1,205
Energy Switch 75 Reverse Holo	Uncommon	$2.99	-13.8%	-23.5%		$191
Darkness Energy 87 Reverse Holo	Rare	$2.97	—	—		$300
Beldum 45 Reverse Holo	Common	$2.84	+10.1%	-15.5%		$175
Warp Energy 91	Uncommon	$2.70	0.0%	+8.0%		$90.20
Wynaut 70	Common	$2.26	0.0%	+13.0%		$64.99
Battle Frontier 71	Uncommon	$2.21	—	—		$83.94
Vulpix 69	Common	$2.16	+24.1%	+35.8%		$130
Great Ball 77	Uncommon	$2.03	0.0%	+2.0%		$75.25
Multi Energy 89	Rare	$2.00	—	—		$38.83
Drake's Stadium 72	Uncommon	$1.99	—	—		$79.05
Cyclone Energy 90	Uncommon	$1.96	—	—		$74.34
Delcatty 8	Rare Holo	$1.89	-40.9%	-42.4%		$895
Energy Recycle System 73	Uncommon	$1.79	—	—		$81.27
Duskull 50	Common	$1.74	+75.8%	+75.8%		$43.58
Kabuto 51	Common	$1.70	0.0%	-0.6%		$291
Omastar 20	Rare	$1.69	0.0%	-0.6%		$69.99
Dusclops 14	Rare	$1.68	+68.0%	-7.7%		$1,688
Slakoth 63	Common	$1.60	+9.6%	+6.0%		$120
Anorith 26	Uncommon	$1.59	+6.7%	+3.9%		$52.29
Vibrava 40	Uncommon	$1.54	—	—		$73.24
Omanyte 56	Common	$1.51	+2.7%	+2.7%		$63.18
Wobbuffet 24	Rare	$1.50	0.0%	-16.2%		$194
Metang 35	Uncommon	$1.50	-5.1%	-3.8%		$85.23
Sharpedo 38	Uncommon	$1.50	+6.4%	+6.4%		$69.64
Lanturn 15	Rare	$1.49	0.0%	0.0%		$69.44
Sableye 22	Rare	$1.49	+8.8%	+8.8%		$64.56
Shelgon 39	Uncommon	$1.49	—	—		$25.00
Aron 42	Common	$1.49	—	—		$73.45
Chinchou 49	Common	$1.49	—	—		$50.28
Energy Removal 2 74	Uncommon	$1.49	—	—		$67.44
Mysterious Fossil 85	Common	$1.49	0.0%	+0.7%		$60.95
Machop 53	Common	$1.41	+76.2%	+78.5%		$198
Professor Birch 80	Uncommon	$1.39	+16.8%	+16.8%		$62.96
Skitty 62	Common	$1.37	+9.6%	+8.7%		$90.42
Zangoose 25	Rare	$1.35	0.0%	+13.4%		$69.24
Claw Fossil 84	Common	$1.29	—	—		$49.39
Lairon 32	Uncommon	$1.26	-6.7%	-16.0%		$85.45
Kirlia 31	Uncommon	$1.25	0.0%	-6.7%		$82.39
Charmander 48	Common	$1.25	0.0%	+19.0%		$549
Spheal 65	Common	$1.23	-10.9%	-13.4%		$49.56
Energy Switch 75	Uncommon	$1.21	—	—		$59.18

Which rarities carry this set's value. Share is the tier's raw cards as a fraction of the whole set. The PSA 10 premium is the median multiple over raw within the tier — cards under £5 raw are excluded from it, and a tier with fewer than three qualifying cards shows no premium rather than a misleading one.