Unsolved single-goal challenges

This page lists unsolved single-goal challenges that are extremely difficult or impossible with current knowledge. None of these challenges have been completed or solved.

Clipping from the bottom area of Wiggler's cave to the top area, or vice versa
Grabbing Ukiki without pressing B (useful for the BBC)
Collecting Mystery of the Monkey Cage without changing the HOLP for an arbitrary HOLP
Transport cloning with Wiggler or Skeeter
Performing a transport clone with 4 simultaneous pushers
Collecting the new impossible coin (THI)
Killing the mystery goomba and collecting its coin
Collecting the red coin in BitDW at the start without using the ! Switch and living
Getting infinite coins in CCM
Cloning in LLL (maybe with fall damage instant release via falling from HSF)
Reproducing the TTC upwarp
Grab a bob-omb fake during boiling
Vertical PU death in LLL
HSWK between towers in TotWC
Survive in a vertical PU with a shell clone released in it
Collecting the BitDW key from underneath the ground, causing you to collect the key on the death floor
Collect a star during a demo sequence
Activating more than 4 stars at once anywhere
Reversing the one-way teleport in THI
Ground-pounding Chain Chomp's post without interacting with the red coin (e.g. collecting its two coin value)
Escaping from one of the fish tanks in the JRB room (starting with zero speed and damage counter)
Moving during time stop in JRB (to get shell clones)
Grabbing the hangable ceiling on the bottom of the beginning cloud in WMotR
Cause a game crash by going out of bounds in the CotMC entry room or in TTM
Accessing the upper floors of the castle without first collecting the key from BitFS
Living after collecting the Impossible 1-up
Collecting Blast Away the Wall without using the cannon, ledge grabbing, or using time stop