[Kameron8]

Shinobi's parry, False Target, cannot trigger against the physical damage dealt by Boxer's Regenschauer.

To replicate:

1.  Fight a Shinobi with a high False Target trigger rate, as a Boxer.
2.  Use Regenschauer 20+ times in a row.
3.  Note that False Target does not trigger.

[Neus]

This is because Regenschauer's damage ignores protection. Damage which does this cannot be parried.