Remaking classical status ailments

[Zantetsuken]

Some more contributions:

Stone/Petrify
What it does: Slow effect with countdown after which your character becomes stone -- Character is unable to move, make any action, and does not take damage. (Effective KO)

how to cure it: Using Return, Esuna, Remedy/Panacea, or 'Gold Needle'

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Aging/Old (FFV-inspired)
What it does: Stats become that of LVL 1 character. Hair turns grey

how to cure it: Esuna, Remedy/Panacea, Lasts 90 sec.

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Curse (FFVIII-inspired)
What it does: TP meter does not fill up. Defense cut in half

how to cure it: Esuna, Holy Water, Lasts 120 sec.

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Frozen (FFIX-inspired)
What it does: HP/MP/TP does not recover. Character suffers double damage from physical attacks

how to cure it: Esuna, Remedy/Panacea, Lasts 90sec.

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Heat (FFIX-inpsired)
What it does: Each action taken results in damage to character equal to 50% of current HP. Character suffers double damage from Magical attacks.

how to cure it: Esuna, Remedy/Panacea, Lasts 90sec.

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(modified the zombie effect that the OP had to fit better with FFV/FFVI style)

Zombie (FFV/FFVI - inspired)
What it does: Lose control of character which walks towards and auto-attacks allies - healing magic is inverted and damages character ('Raise' effects will instant KO) - skin turns grey-green

how to cure it: Esuna, Holy Water, Remedy/Panacea,.