I think it evolves at level 25 into Donophan :D
Golduck is a dual Water and Psychic type Pokemon. It does not naturally learn the move Psyshock, but it can learn it at any level by use of the TM.
The level at which Pupitar evolves into Tyranitar level 55.
Vanillite evolves into Vanillish at level 35, and Vanillish evolves into Vanilluxe at level 47.
It evolves at Lv. 30 into Pupitar. Pupitar evolves at Lv.55 into Tyranitar.
Psyduck evolves into Golduck at level 33.
Psyduck evolves at level 33.
Psyduck evolves into Golduck at level 33.
Psyduck evolves into Golduck at level 33.
in ruby & sapphire psyduck evolves at level 33
Psyduck evolves into Golduck at level 33.
Psyduck evolves into Golduck at level 33.
Psyduck evolves into Golduck, starting at level 33.
psyduck evolves to golduck at level 33.
Psyduck evolves to Golduck at Lv. 33.
It evolves into Golduck at Level 33.
psyduck evolves at level 33 to golduck