Talk:Fusion Reports/@comment-5270942-20130307012819/@comment-5051663-20130307100253

For what it's worth, here's my theory of fusion probabilities. Each dino has *two* weights, one for fusion and one for random hatching. The dino is selected for fusion from eligible biomes in proportion to its fusion weight. (The new part, which I can't prove but it seems to work:) A dino's fusion weight is equal to it's random hatch weight, unless the random hatch weight is 0, in which case the fusion weight is 1. People have been getting the random hatch probability from game files for some time now.

Tier/Biome combinations have 1 or 2 dinos with a fusion weight between 5 and 9, with the rest 1, EXCEPT 2/Air, 3/Forest, 3/Desert, and 3/Air, which have no dominant dino. Tier/Biomes with 2 dinos of equal weight are 1/Desert with Spinosaurus/Dimetrodon and 2/Desert with Kentrosaurus/Homalocephale.

If you want a dino in a particular biome, it may help to select the other biome as one with the least weight.