Why is Prinny 2 so god damn difficult?!!

Yesterday I tried to fight the last boss that I couldn't defeat last week (and last last week...), in the end I finally beat both forms of the boss...which took me about 3 hours with a total of 280 lives lost.

And then I was kinda outta my mind to rush the secret mode and beat the last boss in that mode too, I think that took another one or two hours or so...

But the time and lives spent were not the only...