Air-Walker can't sp3

I got 3* Air-Walker the other day and was trying him out in 1v1 and his power bar won't charge up for a sp3, it gets stuck at 2 yellow boxes and a grey one, it wouldn't even go up in a second fight after I got hit by Doom's SP3 and I had power gain. I've used him 3 times and I can't get a sp3 in any.
WTF?
WTF?
7
Comments