weaknesses = >
nuetral = *
resistances = 1.
( I realize I should have marked nuetral as 1. but its already done)
“Grass”:{18 items

“Bug”:0.625

• “Dark”:1
• “Dragon”:0.625

1. “Electric”:1

• “Fairy”:1
• “Fighting”:1

“Fire”:0.625
"Flying":0.625

• “Ghost”:1

1. “Grass”:0.625
2. “Ground”:1.6

“Ice”:1

• “Normal”:1

“Poison”:0.625

• “Psychic”:1
• “Rock”:1.6
• “Steel”:0.625

1. “Water”:1.6
   }

(Below I have links to tangela and Niantics chart on damage.)

I was writing a dual type calculator when I noticed that almost all of these values are opossite or not correct

I checked a few other types and they too are also almost completely wrong. I was checking grass to figure out.

For instance:
bug is .625 when it should be 1.6

electric,water,ground should be .625
dragon,rock,steel should be 1
fire,fly,ice,poison, should be 1.6

It does not seem like their is a pattern to how it is wrong, especially seeing that some effectivenesses are correct

https://db.pokemongohub.net/pokemon/114
https://niantic.helpshift.com/a/pokemon-go/?s=gyms-battle&f=type-effectiveness-in-battle&l=en&p=web