helioptile

sand-veil

Increases evasion to 1.25× during a sandstorm. Protects against sandstorm damage.

dry-skin

Causes 1/8 max HP in damage each turn during strong sunlight, but heals for 1/8 max HP during rain. Increases damage from fire moves to 1.25×, but absorbs water moves, healing for 1/4 max HP.

solar-power

Increases Special Attack to 1.5× but costs 1/8 max HP after each turn during strong sunlight.