SUPER BOMBERMAN R

This is the first planet in the story mode. It's pretty much a tutorial.
There are 2 types of levels on this plabet; 'Kill all the enemies' and 'hit X number of switches'
The boss is Magnet Bomber. His special attack is a bomb that chases you.
If you've been collecting all the power ups, you should be quick enough the trap him before he uses his special.
His 2nd phase is a spider mech. It's attacks are a sword that has a large circular hit radius, and a club that has a small hit radius. Both attacks can kill you in one hit, like all other enemies.
To beat him, you need to break his legs. While he is stunned, keep blowing his body up.
If you've been collecting all the power ups, you should be able to drop enough bombs to combo his legs from across the map in one go, and then spam him til he gets back up.
His 2nd form for me took 4 stuns before he died.