Evolution

Evolution is a sudden change within a Guilepet that enhances its current abilities, adds new powers, or something similar to the latter. This change usually reassigns base stats and movesets, along with revised or new facets, and a new rank. Guilepets usually have an evolution limit of 2, resulting in a possible 3-stage evolution sequence. There are many ways a Guilepet can evolve.

Levelling up
Most Guilepets evolve by level, which is already predetermined. Guilepets that evolve once usually evolve around the mid-range, while others that evolve twice begin at an early stage, while ending at a mid-range, or late stage. While many don't need an kind of affinity to evolve, some require a linkage to a certain affinity before evolution.

Trade Evolution
Some Guilepets can evolve while trainers trade them to each other. Many Guilepets are often holding something when they get traded.

Evolution Items
Some Guilepets require any item to be held in order to evolve. These items mostly consist of affinities, which allow them to evolve into Guilepets of other facets, and many other items.

Other methods
There are a myriad of other methods of evolution in Guilepets.

Evolution Cluster
Guilepets that evolve into more than one evolution are part of an evolution cluster. This may consist of at least two evolutions. Guilepets that evolve into eight or more evolutions are called Cornerstone Guilepets. The current record of a dense evolution cluster is Neosphin.

Cross-Evolution
There are several few Guilepets that cross-evolve. In cross-evolution, a pair of Guilepets can evolve into the same evolution, with some being able to still evolve into another. Those that can evolve into two Guilepets while cross-evolving may be required to fulfill another evolution requirement.