I'm not sure how it got better, since it was alreadt top-notch/awesome, but okay. The only thing I see about it is Mischievous Heart, but Volbeat doesn't use Special moves, or unless upgraded Tail Glow counts. <3
Volbeat is teh awesome now. <3 Actually it happened when I was learning RNG abuse, which is pretty much a way of getting awesome Pokemon, and I attempted Volbeat and I got awesome IVs without even trying, so it holds a special place in my heart.