In CryptoKitties, mewtation refers to the first time a family lineage combines two cattributes to make a new one.

Mewtation vs Mutation

The best language to describe the gene complexity at work in CryptoKitties breeding, is still an area needing more formalization. However, mewtation is often used to mean the first time a kitty in the family lineage obtains a specific cattribute. In contrast, mutation refers to anytime the cattribute is re-expressed in the family lineage.

Mewtation Charts

Mewtation charts are provider by kitty.fyi.