Unfortunately, there is no easy counter to a style like this. The greatest of us still struggle to deal with it every day and most have given up. The only advice I can offer is complicated. You can chase them furiously and if you know you're about to be whored, move out of the way and quickly turn in the direction that they went flying past. Soon enough you'll get adept at reading which way they are going to run and you can be there right away. After about 3-4 times of this, the guy gets nervous because his ki is dropping and he's not sure if he will win the next whore, so he will charge up for a little bit longer and that's when you nail him. The guy will usually try to aim at you more carefully now, so change what you do, start throwing in random well-placed teleports to confuse him, turn on turbo and hover to either side to dodge him, then resume strategy #1. If you get frustrated and there's nothing you can do, switch to generic beam and do quick short blasts. A half-charged generic beam is enough to blast someone out of a swoop, and if you do enough of them and make good use of area of effect explosion damage, you can win. You could also just throw generic beams into your style for confusion during the actual fight, if you're confident of your quick switching/targetting abilities. Don't try block whoring against him, that probably won't work out for you. Also pay close attention to your speed. A guy like Piccolo has only 180, and if you are trying to beat a Buu who is whoring, you already have a disadvantage since he gets 220. Try Goku/Vegeta/Cell to even up the playing field. More strategies to stop this? You could try drifting, during your swoop let go of your swoop and start falling down/forward, you'll drift pretty fast and gain ki back. Also, I wouldn't interrupt my swoops with teleports TOO much. It seems like a great way to dodge a whore, but they've seen it too much. Try letting your swoops run out and then re-doing them immediately for extra confusion. And also, keep increasing your mouse sensitivity, I capped out around 17.5 and my windows sensitivity is about one notch above half-way. Any more than that and my hand starts twitching to control it, which is no good. Move around in patterns, don't just rely on a teleport/swoop straight in strategy. Try a quick teleport up/swoop down before they reach you, it's rare but it could work. Make good use of your radar, don't ever use mixed mode. An extremely cheap strategy would be to beam jump with a kamehameha or a mouthblast, it is *** but it works. Also, you could try whoring them back every now and then. Sometimes they will be convinced that you're not whoring them and then if you do, it will make them react to you even more. That's all I can think of off the top of my head, I still can't beat these guys as much as I'd like.
-FZERO