Ruling Rainbow energy/Leafeon

[Cortel II]

I have Leafeon RR active so his body works, then i attach a rainbow energy to my benched Pokemon. what would happen fir Leafeon's body or the 10 damage from rainbow?

Poké-Body Energy Refresh
As long as Leafeon is your Active Pokémon, whenever you attach an Energy card from your hand to 1 of your Pokémon, remove 2 damage counters from that Pokémon.

 

[King Arceus]

You get to choose the order the effects happen since it is your turn. You might choose to do the damage first so you can heal it off with Leafeon's Poke-Body.~Mark