This is a work in progress, so the list isn’t remotely complete! In the second generation onwards, the teen evolution indicates the adult body type. However, the same teen has multiple different body types (due to the principle of it) If it has a question mark next to it, it’s a theory. Body types are listed by character names.
Hanbunkotchi: Mametchi, Kikitchi(?), Violetchi(?)
Mokofuritchi: Lovelitchi, Nijifuwatchi(?)
Penribotchi: Memetchi(?)
Kurupoyotchi: Kuchipatchi(?)
Terukerotchi: Watawatatchi
Metotchi: Pompomtchi(?) Nejirobotchi(?)
Hanbunkotchi: Mametchi, Kikitchi(?), Violetchi(?)
Mokofuritchi: Lovelitchi, Nijifuwatchi(?)
Penribotchi: Memetchi(?)
Kurupoyotchi: Kuchipatchi(?)
Terukerotchi: Watawatatchi
Metotchi: Pompomtchi(?) Nejirobotchi(?)