I did this because I felt like it but this is me dissecting what needs to go into a normal legend/human pairing bare minimum.
Dissecting what is needed for a regular legendary/human pairing
Legendary (assuming 3 floors):
Intro to area
Floor 1 (5 options with unique results 2 passes 3 fails)
Floor 2 (5 options 2 passes 2 fails 1 reverse)
Floor 3 (5, 2p, 2f, 1r)
Encounter scene
Assuming Battle
4 moves (like in regular pokemon) each with 1p and 2f all unique
If Quiz
5 questions with three choices 1p and 2f all unique
Breed and defeat scenes
Capture scene
Unlockable repeatable scenes depending (2 if duo 3 if trio or solo)
Ship scenes (this is assuming they have just been captured)
Pregnancy Check
AWC if typing makes them weak to dark
Some inclusion in an unlockable side scene on the ship
Total Scenes/instances:
Battle and in duo (36-37)
Quiz and in duo (39-40)
Battle and in trio/solo (37-38)
Quiz and in trio/solo (40-41)
Human:
Intro
Breed scene
Three repeatable
Two PokeGear messages
Human Instances/scenes (7)