What this is
How well follow-up Pokémon games sell against the game they follow, in their launch year: Ultra Sun/Moon sold 0.49 times Sun/Moon's launch-year copies, and Omega Ruby/Alpha Sapphire 0.81 times X/Y; per console owner the ratios are lower, about 0.43–0.44 and 0.58–0.68.
How it’s built
- Launch-year sales of each follow-up were divided by those of the base game, from Nintendo's results.
- The per-owner version divides each game's sales by the number of consoles in use at the start or end of its launch year, so a bigger console base does not flatter the later game.
What we assumed
- Consoles shipped stand for owners.Nintendo publishes shipments, not active owners, so the per-owner ratios are approximate.
Sanity check
Over their whole lives the ratios rise, to 0.57 for Ultra Sun/Moon and 0.87 for Omega Ruby/Alpha Sapphire; the launch-year adjustment matters most for the older DS games.
The value
- B2W2/BW: gap (BW year to March 2011 units missing)
Some detail is too fine to show here; it is kept in the trainer’s notes.
Where it comes from
Our calculation from other figures in the trainer’s notes.
Show the working
- derived
- see method