[Moves] Sand Attack does not affect Levitate Pokemons

Hello~

When using Sand Attack against any Pokémon with the Levitate ability, the move fails without any message saying anything.

Steps to Reproduce:

1. Capture any Pokemon with Sand Attack.

2. Find a wild Gastly.

3. Use Sand Attack against the Gastly.

Current Result:

No result message appears and Gastly's accuracy is not dropped.

Expected Result:

Gastly's accuracy is dropped and a message appears to tell that result.

Notes:

- This issue has been tested against Haunter and Baltoy.

- This issue does not occur against Flying type Pokemons.