EX Delta Species (Japanese: ホロンの研究塔 Research Tower of Holon) was the 11th EX expansion set for the Pokémon Trading Card Game, and the 26th expansion set (30th in Japan) overall. It was the first expansion to feature δ Delta Species.

History

• October 7, 2005 - Japanese half-deck halves
• October 28, 2005 - Japanese main expansion
• November 4, 2005 - English commercial relase

However the prereleases for the English set were held starting from the October 22, making this the first set in history to be revealed for the first time outside Japan.

Contents

Delta Species contained 86 cards and 3 half-deck halves, 111 cards altogether in the Japanese release. There were 114 cards in the English release, with Darkness Energy, Metal Energy, and a Japanese Azumarill promo as the boxtopper added.

Trivia

• Delta Species introduced the concept of δ Delta Species. These Pokémon possesed unusual types, always being partially Metal in their fully evolved forms, so may be considered the counterpart to Dark Pokémon in the EX series.
• This set contained only 3 Pokémon-ex, a record low for any set in the EX series.
• This set was the first to use the same kind of foil for both the Holo Rares and the Parallel Foils.
• According to the set backstory, the Research Tower is located in the middle of Eidolon Forest and was originally assigned the task of researching Mew. However the English release of Eidolon Forest was pushed back to 2006 to coincide with Lucario and the Mystery of Mew, as was the case with EX Deoxys, so this information was absent from the English release of Delta Species.
• The prerelease Promo for this set was Metang.

Theme decks

• Breakthrough
• Steeplechase

List of cards

North America

No.	Card Name	Type	Rarity
1	Beedrill δ		File:Rare rare.gif
2	Crobat δ		File:Rare rare.gif
3	Dragonite δ		File:Rare rare.gif
4	Espeon δ	File:Physic-attack.png	File:Rare rare.gif
5	Flareon δ		File:Rare rare.gif
6	Gardevoir δ	File:Physic-attack.png	File:Rare rare.gif
7	Jolteon δ		File:Rare rare.gif
8	Latias δ		File:Rare rare.gif
9	Latios δ		File:Rare rare.gif
10	Marowak δ		File:Rare rare.gif
11	Metagross δ		File:Rare rare.gif
12	Mewtwo δ		File:Rare rare.gif
13	Rayquaza δ		File:Rare rare.gif
14	Salamence δ		File:Rare rare.gif
15	Starmie δ		File:Rare rare.gif
16	Tyranitar δ		File:Rare rare.gif
17	Umbreon δ	File:Dark-attack.png	File:Rare rare.gif
18	Vaporeon δ		File:Rare rare.gif
19	Azumarill δ		File:Rare rare.gif
20	Azurill		File:Rare rare.gif
21	Holon's Electrode		File:Rare rare.gif
22	Holon's Magneton		File:Rare rare.gif
23	Hypno	File:Physic-attack.png	File:Rare rare.gif
24	Mightyena δ	File:Dark-attack.png	File:Rare rare.gif
25	Porygon2		File:Rare rare.gif
26	Rain Castform		File:Rare rare.gif
27	Sandslash δ		File:Rare rare.gif
28	Slowking		File:Rare rare.gif
29	Snow-Cloud Castform		File:Rare rare.gif
30	Starmie δ		File:Rare rare.gif
31	Sunny Castform		File:Rare rare.gif
32	Swellow		File:Rare rare.gif
33	Weezing		File:Rare rare.gif
34	Castform		File:Rare uncom.gif
35	Ditto		File:Rare uncom.gif
36	Ditto		File:Rare uncom.gif
37	Ditto		File:Rare uncom.gif
38	Ditto	File:Physic-attack.png	File:Rare uncom.gif
39	Ditto		File:Rare uncom.gif
40	Ditto		File:Rare uncom.gif
41	Dragonair δ		File:Rare uncom.gif
42	Dragonair ō		File:Rare uncom.gif
43	Golbat		File:Rare uncom.gif
44	Hariyama		File:Rare uncom.gif
45	Illumise		File:Rare uncom.gif
46	Kakuna		File:Rare uncom.gif
47	Kirlia	File:Physic-attack.png	File:Rare uncom.gif
48	Magneton		File:Rare uncom.gif
49	Metang δ		File:Rare uncom.gif
50	Persian		File:Rare uncom.gif
51	Pupitar δ		File:Rare uncom.gif
52	Rapidash		File:Rare uncom.gif
53	Shelgon δ		File:Rare uncom.gif
54	Shelgon δ		File:Rare uncom.gif
55	Skarmory		File:Rare uncom.gif
56	Volbeat		File:Rare uncom.gif
57	57Bagon δ		File:Rare com.gif
58	Bagon δ		File:Rare com.gif
59	Beldum δ		File:Rare com.gif
60	Cubone		File:Rare com.gif
61	Ditto		File:Rare com.gif
62	Ditto		File:Rare com.gif
63	Ditto		File:Rare com.gif
64	Ditto		File:Rare com.gif
65	Dratini δ		File:Rare com.gif
66	Dratini δ		File:Rare com.gif
67	Drowzee	File:Physic-attack.png	File:Rare com.gif
68	Eevee		File:Rare com.gif
69	Eevee		File:Rare com.gif
70	Holon's Magnemite		File:Rare com.gif
71	Holon's Voltorb		File:Rare com.gif
72	Koffing		File:Rare com.gif
73	Larvitar δ		File:Rare com.gif
74	Magnemite		File:Rare com.gif
75	Makuhita		File:Rare com.gif
76	Marill		File:Rare com.gif
77	Meowth		File:Rare com.gif
78	Ponyta		File:Rare com.gif
79	Poochyena	File:Dark-attack.png	File:Rare com.gif
80	Porygon		File:Rare com.gif
81	Ralts	File:Physic-attack.png	File:Rare com.gif
82	Sandshrew		File:Rare com.gif
83	Slowpoke		File:Rare com.gif
84	Staryu		File:Rare com.gif
85	Staryu		File:Rare com.gif
86	Taillow		File:Rare com.gif
87	Weedle		File:Rare com.gif
88	Zubat		File:Rare com.gif
89	Dual Ball		File:Rare uncom.gif
90	Great Ball		File:Rare uncom.gif
91	Holon Farmer		File:Rare uncom.gif
92	Holon Lass		File:Rare uncom.gif
93	Holon Mentor		File:Rare uncom.gif
94	Holon Research Tower		File:Rare uncom.gif
95	Holon Researcher		File:Rare uncom.gif
96	Holon Ruins		File:Rare uncom.gif
97	Holon Scientist		File:Rare uncom.gif
98	Holon Transciever		File:Rare uncom.gif
99	Master Ball		File:Rare uncom.gif
100	Super Scoop Up		File:Rare uncom.gif
100	Potion		File:Rare com.gif
100	Switch		File:Rare com.gif
103	Darkness Energy		File:Rare rare.gif
104	Holon Energy FF		File:Rare rare.gif
105	Holon Energy GL		File:Rare rare.gif
106	Holon Energy WP		File:Rare rare.gif
107	Metal Energy		File:Rare rare.gif
108	Flareon ex		File:Rare srare.gif
109	Jolteon ex		File:Rare srare.gif
110	Vaporeon ex		File:Rare srare.gif
111	Groudon ☆		File:Rare ssrare.gif
112	Kyogre ☆		File:Rare ssrare.gif
113	Metagross ☆		File:Rare ssrare.gif
114	Azumarill

Japan

Main set

No.	Card Name	Type	Rarity
1	Weedle		File:Rare com.gif
2	Kakuna		File:Rare com.gif
3	Zubat		File:Rare com.gif
4	Golbat		File:Rare com.gif
5	Koffing		File:Rare com.gif
6	Weezing		File:Rare rare.gif
7	Ditto		File:Rare rare.gif
8	Volbeat		File:Rare rare.gif
9	Illumise		File:Rare rare.gif
10	Beedrill δ		File:Rare rare.gif
11	Crobat δ		File:Rare rare.gif
12	Ditto		File:Rare rare.gif
13	Larvitar δ		File:Rare com.gif
14	Pupitar δ		File:Rare uncom.gif
15	Bagon δ		File:Rare com.gif
16	Shelgon δ		File:Rare uncom.gif
17	Sunny Castform		File:Rare rare.gif
18	Flareon δ		File:Rare rare.gif
19	Mewtwo δ		File:Rare rare.gif
20	Salamence δ		File:Rare rare.gif
21	Tyranitar δ		File:Rare rare.gif
22	Slowpoke		File:Rare com.gif
23	Staryu		File:Rare com.gif
24	Ditto		File:Rare rare.gif
25	Slowking		File:Rare rare.gif
26	Rain Castform		File:Rare rare.gif
27	Snow-Cloud Castform		File:Rare rare.gif
28	Kyogre ☆		File:Rare ssrare.gif
29	Starmie δ		File:Rare rare.gif
30	Vaporeon δ		File:Rare rare.gif
31	Holon's Voltorb		File:Rare uncom.gif
32	Holon's Electrode		File:Rare rare.gif
33	Ditto		File:Rare rare.gif
34	Dratini δ		File:Rare com.gif
35	Dragonair ō		File:Rare uncom.gif
36	Beldum δ		File:Rare com.gif
37	Metang δ		File:Rare uncom.gif
38	Jolteon δ		File:Rare rare.gif
39	Dragonite δ		File:Rare rare.gif
40	Metagross δ		File:Rare rare.gif
41	Latias δ		File:Rare rare.gif
42	Latios δ		File:Rare rare.gif
43	Rayquaza δ		File:Rare rare.gif
44	Drowzee	File:Physic-attack.png	File:Rare com.gif
45	Hypno	File:Physic-attack.png	File:Rare rare.gif
46	Ditto	File:Physic-attack.png	File:Rare rare.gif
47	Ralts	File:Physic-attack.png	File:Rare com.gif
48	Kirlia	File:Physic-attack.png	File:Rare com.gif
49	Espeon δ	File:Physic-attack.png	File:Rare rare.gif
50	Gardevoir δ	File:Physic-attack.png	File:Rare rare.gif
51	Sandshrew		File:Rare com.gif
52	Cubone		File:Rare com.gif
53	Ditto		File:Rare rare.gif
54	Makuhita		File:Rare com.gif
55	Hariyama		File:Rare rare.gif
56	Groudon ☆		File:Rare ssrare.gif
57	Sandslash δ		File:Rare rare.gif
58	Marowak δ		File:Rare rare.gif
59	Meowth		File:Rare com.gif
60	Persian		File:Rare rare.gif
61	Ditto		File:Rare rare.gif
62	Porygon		File:Rare com.gif
63	Porygon2		File:Rare rare.gif
64	Taillow		File:Rare com.gif
65	Swellow		File:Rare rare.gif
66	Azurill		File:Rare uncom.gif
67	Castform		File:Rare rare.gif
68	Poochyena	File:Dark-attack.png	File:Rare com.gif
69	Umbreon δ	File:Dark-attack.png	File:Rare rare.gif
70	Mightyena δ	File:Dark-attack.png	File:Rare rare.gif
71	Holon's Magnemite		File:Rare uncom.gif
72	Holon's Magneton		File:Rare rare.gif
73	Eevee		File:Rare com.gif
74	Skarmory		File:Rare uncom.gif
75	Metagross ☆		File:Rare ssrare.gif
76	Holon Transciever		File:Rare uncom.gif
77	Holon Scientist		File:Rare uncom.gif
78	Holon Research Tower		File:Rare uncom.gif
79	Holon Mentor		File:Rare uncom.gif
80	Holon Farmer		File:Rare uncom.gif
81	Holon Lass		File:Rare uncom.gif
82	Holon Researcher		File:Rare uncom.gif
83	Holon Ruins		File:Rare uncom.gif
84	Holon Energy GL		File:Rare uncom.gif
85	Holon Energy FF		File:Rare uncom.gif
86	Holon Energy WP		File:Rare uncom.gif

Water half-deck half

No.	Card Name	Type	Rarity
1	Staryu
2	Ditto
3	Vaporeon ex
4	Marill
5	Starmie δ
6	Azumarill δ
7	Eevee
8	Potion
9	Master Ball
10	Holon Scientist
11	Water Energy
12	Water Energy
13	Water Energy
14	Water Energy
15	Holon Energy WP

Lightning half-deck half

No.	Card Name	Type	Rarity
1	Magnemite
2	Magneton
3	Ditto
4	Jolteon ex
5	Dratini δ
6	Dragonair δ
7	Eevee
8	Great Ball
9	Super Scoop Up
10	Holon Scientist
11	Lightning Energy
12	Lightning Energy
13	Lightning Energy
14	Lightning Energy
15	Holon Energy GL

Fire half-deck half

No.	Card Name	Type	Rarity
1	Ponyta
2	Rapidash
3	Ditto
4	Flareon ex
5	57Bagon δ
6	Shelgon δ
7	Eevee
8	Dual Ball
9	Switch
10	Holon Scientist
11	Fire Energy
12	Fire Energy
13	Fire Energy
14	Fire Energy
15	Holon Energy FF

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