Seth Tips:
-Quick get up as much as possible to avoid cheap teleport trickery
-If you are lying on the ground and he starts teleporting, he can only fuck you up if he teleports an inch away from you. Wake up EX moves will not work, and even supers may miss since you dont know which side he'll appear on. I find the safest tactic is just to jump away on wake up. Sometimes you'll get shoryuken'ed out of it, but the vast majority you'll be safe
-CPU loves to spam the dash kick that leads to tons of mini hits, expecially when he has ex meter. You can trick him into performing this move on wakeup by throwing a fireball or quick attack when hes lying on the ground...timed so you have time to block the attack. Block and then hes wide open for whatever you got. DONT mash attacks when hes getting up. Asking to be thrown if close or getting EX-kicked/shoryuken to oblivion
-If you are too far away from him he'll spam fireballs. If you are too close you are in danger of throws or focus attacks. Need to be at that perfect midrange, where he will do the attack mentioned above, try to suck you towards him, or does the dhalsim stretchy arms. All are easy to counter, and characters with long range can poke at him from this distance safely
-Learn to fight without jumping. Only jump to counter the attacks mentioned above, when at that perfect midrange
-When he is open, DONT throw and DONT simply low roundhouse. Learn how to chain supers or big combos from standing position. You have to punish him everytime he is open, since it isnt all that often. The good thing about this boss is that he makes you execute under pressure. If you can do this well, then you will also be able to when fighting real people. Especially scrubs that spam shoryukens and Ultras when you are just standing there, hoping youll somehow get sucked into them