![Professor Oak's New Theory (101/123) (League Promo) [HeartGold & SoulSilver: Base Set]](http://www.dragon-egg-games.com/cdn/shop/products/54c72f8f-a064-46bd-b9e2-817ec7174f98_d5c58bf7-325d-49b8-a0aa-675d74c4e2dd_800x.jpg?v=1698799170)
![Professor Oak's New Theory (101/123) (League Promo) [HeartGold & SoulSilver: Base Set]](http://www.dragon-egg-games.com/cdn/shop/products/54c72f8f-a064-46bd-b9e2-817ec7174f98_d5c58bf7-325d-49b8-a0aa-675d74c4e2dd_1024x.jpg?v=1698799170)
Description
| Set: | HeartGold & SoulSilver: Base Set |
| Type: | Supporter |
| Rarity: | Promo |
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![Professor Oak's New Theory (101/123) (League Promo) [HeartGold & SoulSilver: Base Set]](//www.dragon-egg-games.com/cdn/shop/products/54c72f8f-a064-46bd-b9e2-817ec7174f98_d5c58bf7-325d-49b8-a0aa-675d74c4e2dd_800x.jpg?v=1698799170)
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