How may i defeat beldor with Mercedes . Is it just mercedes cause she is nothing good or anything else ? By the way how ?

Well, here's one way . http://www.youtube.com/watch?v=YW3IGuUbUWU

See if you can pull it off.

Then, here's someone beating him normally (half-way through the vid):
http://www.youtube.com/watch?v=wHXimQ0KBqo

EDIT: watch out for spoilers after the boss fight in the 2nd vid.

Now that was a clever battle plan hehehe.

Well, normal way is preccisely bouncing his swords back at him to kock him and then inflict him dammage, but be careful if you hit him at the same time you hit his swords it wont do, however this aint so difficult, its more difficult when you play any melee character, you just have to aim carefully, Beldor will not summon swords near him until you are far from him, pretty much out of his sight, but you can see on the "radar" what is it what he is doing, so first, kill the Knights if you want to make the battle easy, then fly away and take your distance from Beldor, you are likely able to make U alchemy mix by now, which gives you unlimited ammo, so keep firing to shield yourself from the fireballs and when you see he has summoned swrods around him, fly onwards and shot, but just once and make sure you hit a sword to knock him, with that done, well, fire at will, as most dammage as you can, a few consecutive piercing shots as in that video should be able to do it in one pass, if not, repeat the sequence until he is down, shouldnt be too long.

Yes the 'trick' is to first stun him with the swords and then attack.

But the trouble is, he's so damn cheap! Sometimes he summons the swords around you, and you are not anywhere near him.

Other times he summons them around himself, but the two mini-bosses are next to him and they will do their all famous 'ass stomp' and you can't take the time to hit the swords back at him and knock on him before you get 'assed'.

So best to try and lead him away from the twin tanks and get 'lucky'. once he's stunned with his own swords, it's easy piecy with big shot. Doubling your attack power first is always a treat if you can pull it off and not have it expire before he does his swords.

I just defeated him five minutes ago... I used 'invisible' and spammed the two big guys with napalm until they were defeated. If you're lucky they're standing pretty close to Beldor and it'll hit him too. When the three of them are together you could consider using 'phozon burst'. Should you get back to normal, use invisible again. If the guards die, they leave behind tons of phozons to get you recharged again. Beldor is much easier alone. you can then continue the above or defeat him the 'recommended' way by stunning him with his own sword. this is honestly the only way that worked for me because before i tried to beat him i tried all of the other things above. anyways, just try to find out what works best for you.

Hmm, he wasn't very hard for me... None of those wizards were. oO Except with Velvet ... I couldn't aim those chains very well. >o>