Ok, I think I finally figured out what I'm going to do for this, and I think it fits my pokemon rather well.

This scene is from a movie, and I believe it is one of the sadder and more beautiful scenes that I've seen.
Backdrop:Cave
Music: Goodbye ~ Lucario
Props: Pokedoll (shaped like mew would be best if possible), (if possible) aura guardian clothing for Gardevoir.
Gardevoir will be playing the part of Ash (I know, you're female, but what can ya do?), and Sake will be playing the part of Lucario.

Alright. The mew pokedoll will be up on a pedestal-type area, the heart of the Tree of Beginning. Mew is sick, and is slowly dying, and that could mean the end of the tree itself (due to a symbiotic relationship Mew and the tree had going on).

Gardevoir, you will go up to the mew pokedoll, and shape a Heal Pulse into the shape of a sphere, forming it around Mew in an attempt to heal it. The Heal Pulse needs to look weak at first, because you're not trained to be an aura guardian, but then it slowly needs to amass into a large sphere that encompasses Mew entirely. Try to make it look as much like aura as possible.

As the heal pulse does its work, Rosalinda shows visible signs of pain and fatigue. Sake sees this, and motions to Rosalinda to stop this, that she will surely die from the exertion. Rosalinda, defiant, continues to go to work with the Heal Pulse.

Reluctantly, Sake goes to Rosalinda's side, holds out one palm (if you need to, you can use two. It doesn't really matter much), and charges up an aura sphere. This aura sphere is to be made without the intent of doing damage. You need to make sure that the aura sphere is joined with the heal pulse, and the two moves need to become one so that the power of aura begins to heal mew.

Rosalinda, I want you to discretely use a thunder wave on Sake as soon as he makes contact with you on this next part, ok?

As the both of you show more signs of fatigue, and Rosalinda looks like she's about to give out, Sake shoves Rosalinda away to spare her from death. Sake, it is important for you to keep up that aura sphere, ok? It will work wonders if the heal pulse is also somehow kept up, but no matter what, that aura sphere needs to be there.

Rosalinda appears shocked at how Sake will sacrifice himself like this. Sake looks to Rosalinda as the healing is eventually completed, a smile on his face as he knows what's about to happen to him.

As the healing of Mew completes, Sake needs to slowly dissipate the aura sphere. Do not launch it, do not make it explode, just focus so that is neatly dissipates. Then, sake, (hopefully blue) sparks leaping off of him, limps over to the crystal that holds Sir Aaron after going through a similar process, before slumping down.

End Scene.

Also, wow, I just noticed that I've been doing a lot of dark/sad stuff for this contest.