Who Can Become What

Original Can they Become a
  Vampire Shapechanger Mage Wraith Changeling Kuei-jin Mummy Fomori Hedge Mage Psychic Faithful Gypsy Ghoul Revenant Kinfolk Kinain
Vampire NA No No Become No No No Yes No No Yes No No No Born Born
Shapeshifter Yes NA No Become No No Yes Yes Yes Yes Yes Born Yes No NA Born
Mage Become No NA Become No ? Become Yes No No Yes No Yes Born Born Born
Wraith No No No NA No No No No No No Yes No Yes   Born Born
Changeling Become No No Become NA ? No Yes ? ? Yes No Yes No Born NA
Kuei-jin No No No No No NA No ? ? ? No No No No Born Born
Mummy No No No No No No NA Yes No ? Yes No No No Born Born
Fomori Yes No Yes Yes No No Yes NA No No Yes No Yes No No No
Hedge Mage Become Born Become Become Yes Become Become Become NA Yes Yes Born Yes Born Born Born
Psychic Become Born Become Become ? Become Become Become Yes NA Yes Born Yes Born Born Born
Faithful Yes Born Yes Yes Born No Yes Yes Yes Yes NA Born Yes Born Born Born
Gypsy Become Born & Become Yes Become ? No ? Yes Yes Yes Yes NA Yes ? Born Born
Ghoul Become Born Yes Become Born Become Become Yes Yes Yes Yes Born NA NA Born Born
Revenant Become No Yes Become No No ? Yes Yes Yes Yes No NA NA Born Born
Kinfolk Become Yes Yes Become Born Become Become Yes Yes Yes Yes Born Yes Born NA Born
Kinain Become No ? Become NA Become Become Yes Yes Yes Yes Born Yes Born Born NA

Additional Points

Vampire
Any creature except shapeshifters and Faithful lose all powers when becoming a vampire. Shapeshifters rarely survive, if they do they become Abominations, as detailed in the Werewolf Players Guide. Faithful may lose Faith at the ST's discretion. Embraced Gypsies may use Blood Affinities if they drink the blood of a Gypsy with the affinity.

Shapeshifter
Kinfolk may become Garou through the Rite of Sacred Rebirth as detailed in Outcasts. This rite, like nay rite, cannot be performed by Kinfolk who belong to another major supernatural group. More Shapechanger crossover information is in the Werewolf Players Guide.

Mage
Kinfolk with Gnosis or Gifts and Kinain with Glamour cannot Awaken.More details of Mage crossover is the the Book of Shadows and the Book of Mirrors. Numina is lost on Awakening apart from True Faith. Gypsy Mages may use Blood Affinities but are subject to Paradox.

Wraith
All except Faithful lose their powers upon becoming a Wraith, see Buried Secrets for more details. Vampires may not become Wraiths if Diablarised or in Golconda. Faithful may lose Faith at the ST's discretion. Wraiths can only be Ghouled by vampires using the Nihilistics discipline. Any Wraith returning as a Risen has no former powers.

Kuei-jin
Only those of Asian descent may become Kuei-jin.

Mummy
Shapechanger Mummies become trapped in the Umbra, see Mummy 2nd edition for more details.

Fomori
Supernatural Fomori often suffer additional detrimental side effects. See Freak Legion for more detail. Fomori may not have Numina except for True Faith, except for the Brain Eaters who may have psychic powers.

Hedge Mage
Hedge Mages being embraces, Awakening or mummified may convert their Paths into new powers of the appropriate type. See WoD: Sorcerer for more detail.

Ghoul
Shapeshifters are very difficult to Ghoul. Changelings suffer Banality when Ghouled. More details are in Ghouls: Fatal Addiction.

Revenant
Revenants require two Revenant parents. While it would be possible to have Gypsy, Kinfolk or Kinain Revenants their are no Revenant Families in existence that have Gypsy, Garou or Fae blood so none could be born. In the Dark Ages there was one Revenant-Kinfolk family.