1.Stats: Should Golduck get a stat boost, Evolution, Mega Evolution or nothing?
Golduck already has 180 BST gap from 320 BST Psyduck, which can be added to +10 or +20 BST.
An evolution would only make sense for a Porygon-Z style rearrangement with some minimal boost.
Mega Evolution after a small boost seems the most likely option, if it possible.
2.Should Golduck get more abilities?
All abilities Golduck has besides Swift Swim and Cloud Nine(formerly exclusive to Golduck) is bad. Some other ones can be:
- Iron Fist
- Super Luck
- Tough Claws
Golduck has a decent movepool, but t can be expanded. Its association with Poison can be expanded to Poison Jab and Sludge Bomb. Its design would be appropriate for Play Rough, Follow Me and Dazzling Gleam, and it can get X-Scissor as an upgrade to its earlier access to Fury Cutter.
4.What additional typing Golduck can have?
Psychic, Normal and Fighting are the most obvious ones. Ground, Ice and Dark would be lesser options.