I have made a huge discovery in The Klepokalypse! So as you might remember, Dan sealed the P switch over the Bomb-omb cage with solid blocks. HOWEVER what he might not have realized is that those blocks are EXPLODABLE! So if you, say, hit the underside of one of the blocks and set off the Bomb-ombs, you'll set them off and free the P Block. This will allow you to do Reduced Fat early and skip directly to the Snake room. Massive skip!
At first I accomplished this feat by riding a Shell dude all the way to the left but actually if you grab the Koopa's shell, bop off the Goomba with some speed and throw the shell up you'll just hit the Bomb-omb cage and free the P Switch. Very convenient skip.
With this the Klepokalypse is extremely beatable! I've not managed to get past the Snake Room yet, but I think I can. After that it's reasonably straight forward isn't it.
Good luck gang! Hope Dan doesn't take the level down as a result of this topic, ha!