MegaMind Ultimate Showdown

As you may have guessed by the ratio, this is another fairly simple boss.

Just before you get to the boss there's an area where you have to put two cogs on spindles, with the aim to going through the 'mouth' of the thing (it's obvious when you get there!). I'd suggest dying in one of the fights here to make sure you have full health for the boss battle. There are four fights, down on the left, down on the right, up on the platform to the left and up on the platform to the right. Just die on your last one intentionally just to make sure. (I tried standing in the purple clouds from the dragon machine but they didn't seem to injure me at all.)

Once you enter the mouth run down the tunnel to the boss fight. It's fairly simple, just avoid the purple steam, kill the enemies and run to the points marked with blue arrows and hit 'B' to activate them and hit Psycho Delic. Once you've hit the boss three times the boss fight ends. I actually lost quite a bit of health by stupidly running into the purple steam but it's a REALLY short fight so it shouldn't be a problem.