Hydreigon and the female Pikachu are from Nintendo's Pokemon and this screenshot's taken from Valve's Garry's Mod.

When this Pikachu lady begin battling her opponent Hydreigon, it was using Dragon Rush to charge at her when she just used Draining Kiss by blowing the giant heart out of her mouth and is like "MWAH!" and, when it hits it, we hear the blooming effect, just like when Peach used the side special skill on Smash Bros, and sends it very flying now in the speed of sound, thanks to this Fairy-type move being twice the Super Effective against the Dark and Dragon type Pokemon like it. Which means HYDREIGON LOSE, BABY!