Code:
Tentacool:
~Acupressure + Aurora Beam,
~Acupressure + Haze,
~Acupressure + Mirror Coat,
~Acupressure + Muddy Water,
~Acupressure + Rapid Spin,
~Acupressure + Safeguard,
~Aurora Beam + Confuse Ray,
~Aurora Beam + Mirror Coat,
~Aurora Beam + Muddy Water,
~Aurora Beam + Safeguard,
~Confuse Ray + Haze,
~Confuse Ray + Muddy Water,
~Confuse Ray + Rapid Spin,
~Haze + Mirror Coat,
~Haze + Rapid Spin,
~Haze + Safeguard,
~Rapid Spin + Safeguard,
~Mirror Coat + Muddy Water,
~Mirror Coat + Rapid Spin,
~Muddy Water + Rapid Spin,
~Muddy Water + Safeguard,
~Acupressure + Double-Edge,
~Acupressure + Mimic,
~Muddy Water + Double-Edge,
~Muddy Water + Mimic;
Tentacruel:
~Acupressure + Aurora Beam,
~Acupressure + Haze,
~Acupressure + Mirror Coat,
~Acupressure + Muddy Water,
~Acupressure + Rapid Spin,
~Acupressure + Safeguard,
~Aurora Beam + Confuse Ray,
~Aurora Beam + Mirror Coat,
~Aurora Beam + Muddy Water,
~Aurora Beam + Safeguard,
~Confuse Ray + Haze,
~Confuse Ray + Muddy Water,
~Confuse Ray + Rapid Spin,
~Haze + Mirror Coat,
~Haze + Rapid Spin,
~Haze + Safeguard,
~Rapid Spin + Safeguard,
~Mirror Coat + Muddy Water,
~Mirror Coat + Rapid Spin,
~Muddy Water + Rapid Spin,
~Muddy Water + Safeguard,
~Acupressure + Double-Edge,
~Acupressure + Mimic,
~Muddy Water + Double-Edge,
~Muddy Water + Mimic;
New HGSS egg move Muddy Water.
With no reply from mohaji about further updating the Tentacool/Tentacruel list (a number of Muddy Water combos were still missing), I might as well post the full list I came up with for cross-checking purposes here.