When I make movesets my process is often
- What is this character's single most iconic ability or trait?
- What playstyle and attributes would that ability or trait fit with?
- What other moves can I make that can flow well with that move?
- How do I theme those moves to fit the fighter, and how can those themes enhance the moves?
- Birdo's most iconic ability is shooting eggs out of her mouth
- Since the eggs can be stood on in Mario 2, Birdo's moves should provide different movement options - as a dinosaur, it makes sense for her to be heavyweight and slow
- As a fighter with enough movement options as is, Birdo should have a non-offensive Up B; a move that propells her backwards with nose suction; and an offensive move that the Up B goes into
- Birdo's Up B could be a parallel to Yoshi's Side B, and given the origins in Story that move could also be chargable. If Birdo's going to have an inhale move, she should follow it up with a kiss since she's a feminine character. On the topic of femininity, how about being able to cancel the Up B into a ballerina drill attack, and in turn make it a multihit?