(Pokémon Red, Blue, Yellow, Gold, Silver and Crystal Versions)
Harden is a Normal-type move.
Learnset
The following Pokémon can use Harden:
| Pokémon | Learnt |
|---|---|
| Heracross | by breedingGSC |
| Metapod | at level 1 |
| Metapod | at level 7YGSC |
| Kakuna | at level 1 |
| Kakuna | at level 7GSC |
| Geodude | at level 26 |
| Graveler | at level 27GSC |
| Graveler | at level 29RBY |
| Golem | at level 27GSC |
| Golem | at level 29RBY |
| Grimer | at level 5GSC |
| Grimer | at level 42RBY |
| Muk | at level 1GSC |
| Muk | at level 33GSC |
| Muk | at level 45RBY |
| Onix | at level 23GSC |
| Onix | at level 43RBY |
| Krabby | at level 16GSC |
| Krabby | at level 40RBY |
| Kingler | at level 16GSC |
| Kingler | at level 49RBY |
| Staryu | at level 1GSC |
| Staryu | at level 22RBY |
| Starmie | at level 1RBY |
| Pinsir | at level 25GSC |
| Pinsir | at level 43RBY |
| Kabuto | at level 1 |
| Kabutops | at level 1 |
| Snorlax | at level 41RBY |
| Gligar | at level 13GSC |
| Steelix | at level 23GSC |
| Qwilfish | at level 10GSC |
| Slugma | at level 22GSC |
| Magcargo | at level 22GSC |
| Corsola | at level 7GSC |