The Pokémon Infinite Fusion Calculator is a tool that lets you mix two Pokémon to create a new fusion. You can pick one Pokémon as the "Head" and another as the "Body," and the tool will show you the fusion result. It also shows what happens if you swap the Head and Body.
The fusion result includes a picture (called a sprite), stats, abilities, and how strong or weak it is against different types. If an artist has made a special sprite for the fusion, their name will appear on the image. If there isn't a special sprite, the tool uses an auto-made one labeled "Autogen."
On the right side of the fusion result, you'll see the Fusion Dex ID. You can click the sprite to see more details about that fusion.
Below the picture, you'll find stats like HP, Attack, Defense, Sp. Atk, Sp. Def, and Speed. It also shows Normal and Hidden Abilities. If you hover over or click the little “i” icon next to an ability, you can read what it does.
At the bottom, the tool shows how strong or weak the fusion is against different types. This is shown as numbers like x2 (strong), x1 (normal), x0.5 (weak), or x0 (no effect). This helps you see how it will do in battles.