Warp to Mario level 1-2 -
On level 1-3 Bash through the 1st set of spikes to the left of the 1st suspended platform fall down the passage and break the Question mark block to warp.
Warp to Pitfall -
On level 2-1 pull the 1st vertical platform to the left, climb the ceiling and drop down using heavy to break through the ground fall down the passage and into a room with a giant pitfall Harry sprite to warp.
Warp to Pac-man-
On level 4-4 right before the collapsing pillars climb under the 1st overhang and break through the wall, fall down the passage and into pacmans mouth to warp.
Warp to the isle of the dead-
On level 3-4 in the room where the skulls fly out of the ground run and grab onto the 1st skull platform that shoots out, ride it up into the air till you see a platform marked 666, jump to that platform to warp.
Complete isle of the dead.