To new recruits, until you get to the mission where you go into Gloaming Wildwoods, you might not realise that there are bosses in this game. This is a guide on how I kill them.
Snarbolax (Tier 1)
There is only 1 stage.
Get a gun that isn't autogun before you start Gloaming Wildwoods. When you get to the battle, hold down the shield button and DON'T LET GO. When Snarbolax gets close to the bell, take your gun out, release the shield, and shoot the bell. Then beat the hell out of Snarbolax while he's stunned. Repeat. Don't get scared at the Defense up, it just means he's ivunerable again.
Jelly King (Royal Jelly) (Tier 2)
There are 2 stages. There are 2 Methods of killing him.
STAGE 1
The Royal Jelly and his army appear, and attack you. The Jelly King can only do a spin or summon Jelly Cubes or summon more Polyps. The Polyps can summon Royal minis and thorns which can heal the Jelly King when combined.
STAGE 2
The Royal Jelly can now get ivunerable and spin around. Not much difference.
KILL FEST (If you can deal lots of damage easily)
The Jelly King and his minions of Jelly Cubes, Royal Polyps and Royal minis appear. Ignore all the minions, and go straight to the Jelly King and beat the hell out of him. Use Curse, Poison and Fire vials to help you with this.
The above method is risky for newbies and can easily tear hell out of your party if this goes wrong. This is the most popular method.
STAVATION (If Kill fest won't work)
There are limited number of Polyp spawns. If you kill all the Polyps, then all the Royal Minis, you can starve the Jelly King to death as he can't heal the damage you give him.
The above method is easier, and a better option for a less experienced team, but takes longer.
Roarmulus Twins (Tier 2)
There are 3 stages, but as there are 2 of them, they don't allign and come as 5. I will say Roarmulus 1 always gets the damage first. Roarmulus 2 is the other one. Be sure to know who the switcher is BEFORE you start.
STAGE 1
After you press the button, Roarmulus 1 and 2 rise from below. They start to shoot missiles at you. Break the blocks above and below the button. Let the switcher get to a switch. As a switcher, keep the switch turned on one colour, and leave it until there are no colliding missiles. Let them fire thier missiles, then hit the switch just before Roarmulus 2's missiles hit the wall. Make sure your Roarmulus 2 is the Roarmulus AWAY from the risen wall. Roarmulus 1 should fall when hit by Roarmulus 2's missiles, where you pound on him. Repeat.
STAGE 1.5
This is the stage that no matter how good you are at switching, or how good you are at the game, you can NEVER stop this stage taking long. Roarmulus 1, whom you dealt heavy damage to last stage is now moving up and down, and is making rockets rain from above. Wait for him to align in the middle, have the wall away from Roarmulus 1 up, and do what you did for stage 1. The reason it takes so long is because Roarmulus 1 NEVER aligns.
STAGE 2
Both are raining missiles, not ivunerable and moving now. From now on, it relies on how good the switcher is. The switcher should have the wall away from Roarmulus 2 up, let Roarmulus 2's missiles though, and 50% of the time Roarmulus 1 should hit Roarmulus 2's missiles, then you damage him.
STAGE 2.5
Roarmulus 1 is still doing as in stage 1.5, but is now firing lasers aswell. Do the same thing as stage 2.
STAGE 3
No ivunerablity, all raining missiles and lasers and a lot of chaos. The same as stage 2, but remember, if you hit a Roarmulus while he's lasering, he'll fall directly AFTER the laser. Damage one to finish.
HOW TO FAIL
There are 2 main ways to fail.
1. Messing up a switcher's switches. Doing this will make it impossible to win.
2. Letting scuttlebots mess up a switcher. This is just as bad as the first one.
Lord Vanaduke (Tier 3)
There are 5 stages.
STAGE 1
It's Vanaduke! Just do damage on him.
STAGE 2
There are projectiles everywhere, and Vanaduke's mask is floating everywhere.Get some water and throw it on his moving mask. Pound on him while it's immobilised. Repeat.
STAGE 3
Vanaduke summons Slag Walkers, and is orbited by 4 balls of fire! Use the water to extinguish the fire. Beware of the Shadow Fire on the floor.
STAGE 4
The same as stage 2, but more hell and projectiles.
STAGE5
No mask. It's faceless Vanaduke, and orbited by 8 balls of fire. also has 2 Slage Guards gauding him.
I hoped this has help.
Cool.