Rock Smash
It appeared as though generation four had completely rid itself of the out-of-battle effect of Rock Smash. In generations one and two, when using Rock Smash in the field, there was the possibility of encountering a wild Pokémon. Though it was usually a Geodude and simply proved to be an annoyance.
HGSS bring back the move's field use and expand on it. There are a variety of Pokémon and items that you can encounter when using Rock Smash in the field and this is especially useful when it comes to the shards that you may find.
Pokémon Found
When using Rock Smash on a random smashable rock, or one in your path, one of the seven following Pokémon may appear.
| Pokémon | Location | Pokémon | Location |
|---|---|---|---|
 |
Vermillion City |  |
Dark Cave, Rock Tunnel, Ruins of Alph and Victory Road |
 |
Victory Road |  |
Cianwood City, Cliff Cave and Rt. 19 |
 |
Cliff Cave and Rt. 19 |  |
Dark Cave |
 |
Cianwood City and Vermillion City |
Items Found
The locations of items have many similarities, so rather than list the locations associated with each item they locations have grouped by number.
Items will have a y(yes) or n(no) listed under 1, 2, or 3. This indicates whether the item appears at the numbered location(s) listed below. Reference the following numbers to determine the locations for each of the items. Believe me, this is a lot less confusing than the redundant mess that would be here had I just listed the locations with the items.
- Cianwood City, Dark Cave, Rock Tunnel, Rt. 19, Vermillion City and Victory Road
- Cliff Cave
- Ruins of Alph
| Item | Use | Version | 1? | 2? | 3? |
|---|---|---|---|---|---|
 |
In Diamond/Pearl: Trade for TM18 (Rain Dance). In Platinum: Trade in exchange for move tutoring. Visit here for more. In HGSS: Trade in exchange for a variety of berries. Visit here for more. |
HGSS * | y | y | y |
 |
In Diamond/Pearl: Trade for TM07 (Hail). In Platinum: Trade in exchange for move tutoring. Visit here for more. In HGSS: Trade in exchange for a variety of berries. Visit here for more. |
HGSS * | y | y | y |
 |
In Diamond/Pearl: Trade for TM11 (Sunny Day). In Platinum: Trade in exchange for move tutoring. Visit here for more. In HGSS: Trade in exchange for a variety of berries. Visit here for more. |
HGSS * | y | y | y |
 |
In Diamond/Pearl: Trade for TM37 (Sandstorm). In Platinum: Trade in exchange for move tutoring. Visit here for more. In HGSS: Trade in exchange for a variety of berries. Visit here for more. |
HGSS * | y | y | y |
 |
Can be given to a scientist to revive a Anorith. In Sinnoh: Take to Oreburgh City. | HG | n | y | n |
 |
Can be given to a scientist to revive a Kabuto. In Sinnoh: Take to Oreburgh City. | SS | n | n | y |
 |
Can be given to a scientist to revive a Omanyte. In Sinnoh: Take to Oreburgh City. | HG | n | n | y |
 |
Can be given to a scientist to revive an Aerodactyl. In Sinnoh: Take to Oreburgh City. | HGSS | n | n | y |
 |
Can be given to a scientist to revive a Lileep. In Sinnoh: Take to Oreburgh City. | SS | n | y | n |
 |
One of a Pokémon's known moves has its PP fully restored. Single use. | HGSS | y | y | y |
 |
A fainted Pokémon is revived and also has half of its maxmimum HP restored. If maximum HP ends on an odd number the amount of HP restored is rounded down to the nearest whole number. Single use. | HGSS | y | n | n |
 |
A fainted Pokémon is revived and also has its HP completely restored. Single use. | HGSS | n | n | y |
 |
In Sinnoh: Can be sold for 3,750. No other use exists for this item. | HGSS | n | y | n |
 |
In Sinnoh: Can be sold for 700. No other use exists for this item. | HGSS | n | y | n |
 |
In Sinnoh: Can be sold for 5,000. No other use exists for this item. | HGSS | n | y | n |
 |
In Sinnoh: Can be sold for 4,800. No other use exists for this item. | HGSS | y | n | n |
 |
Can be traded to a Move Relearner to teach, or reteach, a Pokémon a level-up move it has forgotten. In Sinnoh: Pastoria City. | HGSS | y | n | n |