This is my basic Genera guide that I use against him, with all characters. The reason it works is because Genera has the same attacks, and the same counters for everyone. His stratagy remains the same no matter who you play against him, and no matter what difficulty your on, unlike Tengu.

Contetents of my guide include:
1) The Stage
2) Genera's Strategy
3) Genera's Combos
4) Avoding Genera's Magic
5) Putting it all togeter
6) Genera's weakness

The Stage
Genera appears in flame and fire, he has set from his fire ball, so there is no escape and you must defeat him or die. The stage is very blury do to the burning heat (if you recall in DOA2 Tengu used a simular magic attack that blured the environment) This is also the largest stage in the game, there are no boundries. It is created so you are pushed as far away from Genera as possible. There is also many burning pieces of rubage, that Genera enjoys throwing you into.

There is one other handicap to this stage, if you look at your health bar very carefully you will notice it is automatically droping, it will continue to the point right before you die. This must be do to the intense heat of the stage.

Genera's Strategy
Genera will attack you as soon as the fight begins, mostly shoving you with his staff, attempting to knock you back as far as he can, right from the start. He will then most likely hit you with a series of lightning bolts, or flame attack. Genera also has a three hit combo, at close range. And he will spin his staff if you run into it, it will knock you away from him again. If you avoid it, he will most likely charge you with a power attack, knocking you away. When Genera is being pounded on, he doesn't make much of a blocking notion, so if you see his life isn't going down, as your hitting him, its most liekely he is preparing to counter you. Think of Genera as a beefed up Tengu, he suposedly uses his fighting style, but its increasingly powerful from the few DOATEC touchups.

Avoding Genera's Magic
Genera has the following magic attacks.

Fire= this attack genera send a flame out of his palm in moves all accross the screen attempting to hit you. The only way to block this is by ducking under it.

Wind= Genera will send a wind gust at you, (the same attack Tengu uses) by throwing a jolt of energy towards the ground. This can be dodged by low blocking or jumping.

Lighting Bolts= The most powerful of Genera's magic. He will send a series of unblockable bolts at you, that can only be avoided by quickly moving to the side the oppisite way.

Ground Burst= The cheapest of Genera's attacks. When he hits the ground impact will cause a magic bust to knock you down as well. He will most likely hit you with a lightning bolt in the even this happens. You can avoid his ground burst you jumping as soon as he starts to lose balance.

Putting it all togeter
The key to beating Genera is close up. Fight him head on, his whole idea of combat is to knock you away from him, weaken you up, then finish you up close. Never throw Genera, he is unthrowable. That will only result in him knocking you back. Never counter genera, instead use dodge. And combo him from behind. Brace yourself for when he fall, at that point, jump. And when he gets up, prepare for him to knock you back, or try a throw. If you manage to dodge him again, and can hit in another combo, you will defeat him :)

Genera's Weakness
He has very low life. I don't know why but his health bar decreases faster then all other characters. A few up close combo's will defeat him.

I hope you can use this guide, and that it helps you next time you want to beat Omega and actually see an ending without 99 tries. Good thing DOA3 has a threater, or think of how much trouble it would be to see Christie's shower scene LOL. :D

Also please pm me if you wish to post or reproduce this guide ;)