Castlevania: Harmony of Despair

This achievement is obtained by beating Dracula at the end of chapter 6, which is actually rather easy if you're using Shanoa. Other characters may have similar cheap strategies, but I can easily defeat him without getting hit using Shanoa. It's easier to do this solo from what I've seen, but if you have a good group that are adept at dodging, it's still pretty easy.

Shanoa's lightning spell, Fulgur (obtained by holding up on the D-pad to absorb the glyph when the flying glowy witch things try to cast it) is pretty much all you need.

Drac's first form is simple. He will teleport around and do one of three attacks. He'll either shoot little fireballs from his cape, shoot bigger meteor looking things in a high-low-high-low pattern (duck or jump accordingly) or bring fire columns up from the ground. You can see where they will be spouting before they do it, and can dodge them easily. He will sometimes do the flame spouts in conjunction with the meteor things, but it is still relatively easy to dodge. In this form, you have to hit him in the head to do any damage. Spamming lightning is a great way to do that, or you can get close and hit him with whatever physical weapons you want.

After you pummel him enough, he transforms into his second form, which is a flying bat/gargoyle/demon thing. He takes forever to actually attack you in this form. You can hit him anywhere with anything and it'll do full damage, so the idea is to stay away and spam lightning. He has four main attacks in this form, all of which are easy to dodge. He can shoot a ball of fire into the ground, which causes a flame wall to scoot across the ground toward you. Jump over it at its highest point. He can also charge up a giant beam (similar to the first boss') which you can avoid by standing in a corner and double jumping right when he shoots it. His third attack involves him jumping away and shooting down little green spores which will poison you if they hit you, but as long as you are not under him or right next to him when he does this, you're safe. He also shoots out these flying skull things that are honed in on your current position. You can lead them away and jump as needed, it looks trickier than it is.

Dracula's third form is where Shanoa really shines. He turns into this flying... thing that is horizontally based. It's the same form he's used in another game, I just can't recall which. He has two claws that you have to slide under to reach his weak point, which is his middle. Physical characters that can't quite hit him from the outside have to slide underneath and attack him from below, which makes things a good deal harder. Shanoa can stand in a corner and spam lightning, never getting near him. His main attacks are as follows: He will sometimes do a claw swipe where he moves to one side and then back to the middle. Shanoa doesn't have to move to avoid this, but anyone underneath needs to either match his movements, or slide out the other side and then back in. He also has an attack where he sends out these hearts in a circular pattern. If you're hit by a heart, you become charmed for a while (this is the only place to unlock Poetic Justice if you're playing in a group) and lose control of your character. The hearts fly straight in the direction they're pointing, making them easy to avoid ahead of time. He also has a laser-type attack that follows a similar pattern to the hearts, but does considerable damage. You can see where the lasers are going ahead of time and can move away. He has a prismatic triangle attack as well, where he shoots triangles that are honed in on your current position. If you're in the corner, you can double jump over the first two, stay low for the next two, then jump the rest. Pretty easy to dodge that. His final attack is a giant dark bomb that resembles the Ultima spell from Final Fantasy 6. It takes up most of the screen, except for the corners. He will charge up a little bit and say "Demonic Mekido" (dunno if that's correct) and let it loose.

Once you learn the timing of all his attacks (which isn't even all that hard) he really is a piece of cake. If you have any questions, let me know and I'll help out.