Triple types with only 1 weakness, with (bad) examples:
- Bug/Dragon/Steel: Bug Duraludon removes its Fighting and Ground weaknesses, but it loses its Flying and Rock resistances and becomes weak to Fire. (Dragon also reduces Scizor to a 2× Fire weakness.) Also 8× resists Grass, not that it matters.
- Bug/Electric/Water: Electric Araquanid removes its Electric and Flying weaknesses, although losing its Ground resistance, leaving it only weak to Rock.
- Bug/Fairy/Steel: Bug Klefki removes its Ground weakness and gives it a Fighting resistance, although losing its Flying and Rock resistances and increasing its Fire weakness to 4×.
- Dark/Electric/Poison: Dark Toxtricity turns its Psychic weakness into an immunity and gives it Dark and Ghost resistances, although removing its Bug, Fairy and Fighting resistances, leaving it only 4× weak to Ground.
- Dark/Ghost/Normal: Ghost Obstagoon turns its 4× Fighting weakness into an immunity and also removes its Bug weakness and gains a Normal immunity and Poison resistance, although losing its Dark resistance, leaving it only weak to Fairy.
- Dark/Ghost/Poison: Dark Gengar turns its Psychic weakness into an immunity and also removes its Dark and Ghost weaknesses, although removing its Fairy resistance, leaving it only weak to Ground. Dark Haunter would have no weaknesses, due to Levitate.
- Dragon/Fairy/Steel: Dragon Klefki removes its Fire weakness and gives it Electric and Water resistances, although losing its Fairy and Ice resistances, leaving it only weak to Ground. It does get Prankster Magnet Rise...
- Dragon/Flying/Steel: Flying Duraludon, Steel Dragonite, Dragon Corviknight end up only weak to Ice.
- Dragon/Poison/Steel: Steel Dragalge removes three weaknesses but increases its Ground weakness to 4×.
- Electric/Flying/Steel: Electric Corviknight, Steel Zapdos, Flying Magnezone end up only weak to Fire.
- Fairy/Ghost/Normal: Normal Mimikyu turns its Ghost weakness into an immunity, leaving it only weak to Steel.
- Fairy/Grass/Steel: Fairy Ferrothorn, Grass Klefki, Steel Tapu Bulu end up only 4× weak to Fire.
- Fairy/Ground/Water: Ground Tapu Fini turns its Electric weakness into an immunity, removes its Poison weakness and gives it a Rock resistance, but increases its Grass weakness to 4×. Sap Sipper Ground Azumarill would have no weaknesses.
- Flying/Steel/Water: Water Corviknight removes its Fire weakness and gives it an Ice resistance but increases its Electric weakness to 4×.
- Ghost/Normal/Psychic: Ghost Indeedee removes its Bug weakness and gives it Normal and Fighting immunity but increases its Dark weakness to 4×.