| Leech Seed | Details | Level Up | TM | Move Tutor | Egg Move |
| Gen IX Dex | Gen VIII Dex | Gen VII Dex | Gen VI Dex | Gen V Dex |
| Gen IV Dex | Gen III Dex | Gen II Dex | Gen I Dex |
| Attack Name | Battle Type | Contest Type |
| Leech Seed |  |  |
| Power Points | Base Power | Accuracy |
| 10 | 0 | 90 |
| Battle Effect: Plants a seed on the foe to steal HP on every turn. |
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| Secondary Effect: User steals HP from the opponent every turn. | Effect Rate: -- % |
|
| TM # | Appeal Points | Jam Points |
| None | 
| 
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| Contest Effect: Startles all POKéMON that have done their appeals. |
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| BrightPowder | King's Rock | Physical Contact |
| Yes | No | No |
| Battle Palace Style | Battle Arena | Pokémon Hit in Battle |
| Assist | +0 | Selected target |
| Picture Example of Leech Seed | ||
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Pokémon That Learn Leech Seed By Level Up in Ruby/Sapphire/Emerald/Colosseum/XD:
| No. | Pic | Name | Type 1 | Type 2 |
| #001 |  | Bulbasaur |  |  |
| #002 |  | Ivysaur | | |
| #002 | | Ivysaur | | |
| #003 |  | Venusaur | | |
| #003 | | Venusaur | | |
| #102 |  | Exeggcute | |  |
| #187 |  | Hoppip | |  |
| #188 |  | Skiploom | | |
| #189 |  | Jumpluff | | |
| #251 |  | Celebi | | |
| #285 |  | Shroomish | |  |
| #286 |  | Breloom | |  |
| #286 | | Breloom | | |
| #315 |  | Roselia | | |
| #331 |  | Cacnea | | |
| #332 |  | Cacturne | |  |
Pokémon That Learn Leech Seed By Level Up in Fire Red/Leaf Green:
| No. | Pic | Name | Type 1 | Type 2 |
| #001 | | Bulbasaur | | |
| #002 | | Ivysaur | | |
| #002 | | Ivysaur | | |
| #003 | | Venusaur | | |
| #003 | | Venusaur | | |
| #102 | | Exeggcute | | |
| #187 | | Hoppip | | |
| #188 | | Skiploom | | |
| #189 | | Jumpluff | | |
| #251 | | Celebi | | |
| #285 | | Shroomish | | |
| #286 | | Breloom | | |
| #286 | | Breloom | | |
| #315 | | Roselia | | |
| #331 | | Cacnea | | |
| #332 | | Cacturne | | |
Pokémon That Learn Leech Seed By Breeding:
| No. | Pic | Name | Type 1 | Type 2 |
| #114 |  | Tangela | | |
| #152 |  | Chikorita | | |
| #153 |  | Bayleef | | |
| #154 |  | Meganium | | |
| #191 |  | Sunkern | | |
| #192 |  | Sunflora | | |
| #252 |  | Treecko | | |
| #253 |  | Grovyle | | |
| #254 |  | Sceptile | | |
| #270 |  | Lotad |  | |
| #271 |  | Lombre | | |
| #272 |  | Ludicolo | | |
| #273 |  | Seedot | | |
| #274 |  | Nuzleaf | | |
| #275 |  | Shiftry | | |
| #357 |  | Tropius | | |
Pokémon That Learn Leech Seed By Purifying or A Special Way:
| No. | Pic | Name | Type 1 | Type 2 |