PokéBase - Pokémon Q&A
2 votes

Title says it all.

closed with the note: Very trivial and finding an answer would take too much work for what it's worth.
closed by
> The score is worked out by how fast the captures are completed and what Pokémon are transferred over. If a rarer or a legendary Pokémon is migrated, such as Mewtwo, a higher score will be given, as opposed to more common Pokémon such as Rattata, which will be given a lower score. Timing will also alter the score: if it takes longer to complete the challenge the score will be decreased; however, if it takes a shorter amount of time to complete the challenge, the score will be increased.
But, like, more specifically?
Yeah, the Bulbapedia page doesn't give a formula here :\
If you want me to turn it into a comment, I can (or I guess you could, too)