Squirtle shell

Squirtle shell A Squirtle shell is a shield for the ventral and dorsal parts of (and evolutionary relatives), completely enclosing the body of the Squirtle and in some cases even the head and limbs. It greatly resembles that of a turtle, which proto-Squirtle might have evolved from.

In Proto-Squirtle
Squirtle's shell, according to physical Pokédexes (Pokédexes in the form of publications) forms and hardens after birth. It also appears differently for each of its evolutionary form.

In this Pokémon world's Squirtle
The Squirtle/Blastoise that parent their newborn Squirtle may get a shell directly from a Pokémon Center staff member who offers Squirtle shells in front of them. Once Squirtle have their shell on, they stay that way until they break or are left behind by the Squirtle wearing it. These kind of Squirtle shells are non-living objects, so they cannot grow with the Squirtle wearing it. As they mature, the shell they wear can feel tighter with age, and the ability for them to hide in it can get harder over time as well. until they have become too large to comfortably fit their shells. To overcome the attachment of their shell, they outgrow their shells by breaking them through, exposing their hidden parts, mostly the stomach. Unlike real turtles, Squirtle, while breaking their shell, especially due to outgrowth, will not bleed and/or receive any injuries. When their shell has broke due to outgrowth, they would wear a new one. However, if the reason Squirtle's shell has broke is not outgrowth, either it might have gained weight, or there is a possible chance of common bodily damage like bleeding (from either their inner body, shell or possibly both) and/or physical injuries resulting in them having their shell repaired. If they get injured enough to break their entire shell, they may have to either have their shell repaired or wear a new one. Squirtle like these outgrow and break 10 shells on average before they have completely matured. Squirtle get their shells through a Pokémon Center's equipment area by asking for Squirtle shells in many different sizes.