The best way to beat the guardians 2 the door at the end of mission 5 is 2 use bothe weapons. Use Rebellion {sword} on the Blue Guardian. This will cause way more damage than guns or Cerburus. I also recommend you don't use stinger {the charge and stab attack upgrade} because regular combos do better damage and you can get attacked while doing the "million stab" by the other guardian. Use Cerberus {the 3 blue locking rods with the power of ice} on the red Guardian. This will also cause super effective damage on him.

Complete level 18 two or three times to have level 3 unlocked of any style

Note : quicksilver and doopelganger dosent have any level so they will not work

Whilst fighting him always make your first meelee attack directed at his eyes as he will be blinded and open to attack for longer

If there is a gap that you can't get over, press L1 + square + forward with the Rebellion on the edge of the gap and that will send you flying over the gap.

When in Demon mode with rebellion, if you jump up and hold down the R1 button, Dante wil start to glide downward in the direction you point him.

When on a ledgethat can be jumped off of, do the stinger move towards the edge and instead of him falling off, he will glide in the direction you were facing.

When you are ridding the elevator up in the Surge of Fortunes room in Mission 5, stand in the centre (make sure you are in Gunslinger style and have the shotgun equiped) when the 1st Hell Prides drop around you, use Fireworks to knock them all off the elevator. This will stop too many Hell Prides from getting on the elevator causing it to fall.

Its pretty easy really all you have to do is jump on his head when he swings his two swings ,then slice him but don't shoot that only makes things worse he'll come up from the ground and strike you,Good Luck!

Have the Doppleganger Style equipped (first you must unlock it on either Stage 16 or 17) and have a second analog controller equipped.

Then press R1+O and a second Dante should be standing next to you then press Start on Player 2's controller and now you should be able to control the Shadow Dante.

Please note the camera only centers around the real Dante. Also, Shadow Dante is invulnerable and can cause damage.

But don't worry about getting hurt because they don't waste their time hitting you. They'll only aim for the real Dante.

After you get Agne and Rudra (I think that's the name),first make sure its on easy automatic mode,then keep on playing the first level,and with your swords.

You'll start doing lots of combos,try to get S for every combo,make sure you dont get hit at all, collect all the red orbs you see,and try to kill all the monsters as quickly as you can.

If done correctly,you will get an S grade at the end of the mission,giving you 5000 red orbs.

Keep on repeating the same level to earn yourself a huge amount of orbs,so you can buy more moves,items etc..,by the way, if you do this a lot,you can also upgrade a style in no time.

Make sure you play the first level only because its the easiest and shortest.

I hope this helps.