All Energy cards that provide only Colorless Energy attached to your Grass Pokémon provide Grass Energy instead.

Green Blast

20+

Does 20 damage plus 10 more damage for each Grass Energy attached to all of your Pokémon.

Toxic Sleep

The Defending Pokémon is now Asleep and Poisoned. Put 2 damage counters instead of 1 on the Defending Pokémon between turns.