|“||Frostbite: This is because the cold is contained within you and ever since you acquired your ghost abilities you've only been letting it out in small amounts.||”|
–Frostbite to Danny about his Ghost Sense that was part of his Ice powers.
The user can sense nearby ghosts. This ability is activated involuntarily, and half-ghosts with this power can use it even while in human form. Occasionally it activates with the presence of each new ghost. When the ghost is near the user breathes out a cold blue mist from their mouth, and inexperienced users sometimes shiver as well. The only ghost known to have a different color (red) and come out differently (nose) as their ghost sense is Dark Danny, though the reason for this is unknown. The ability only works on the human plane and is inactive when the user is in the Ghost Zone.
It is a sub-power of cryokinesis. The temperature of the mist is a result of the ghost's cryokinetic abilities being released involuntarily. The user maintains the ability even if they master control of their cryokinetic abilities.
- Artifacts, such as Dora's ring may block this ability.
- Adversaries can disguise their presence by keeping the environment cold, such as Penelope Spectra setting the thermostat in her office to a lower temperature.
- It sometimes doesn't activate in the presence of humans being overshadowed.
- Doesn't sometimes activate in the presence of half-ghosts, as seen during Danny's interactions with Dani Phantom or Vlad Plasmius, as his ghost sense didn't go off when they were in ghost mode.
- The only known exception to this rule is Dark Danny's ability to sense Danny Phantom in ghost mode. However, Danny was able to sense his other clones and Tucker Phantom who was in both human and ghost form for unknown reasons.
- Ghost Sense is a reference to the Marvel superhero Spider-Man's "Spider-Sense," which allows him to sense approaching danger before it happens.
- It is unknown why Dark Danny's ghost sense is red, rather than blue. There are a few speculations for this change:
- It could possibly be due to his evil/opposite nature.
- It could be because a heat core replaced Danny's ice core, giving it a red color.
- It could be because Dark Danny is full of Danny's negative emotions.
- It implied Vlad had this power but was never seen in the series.