It was not confirmed by Niantic, but these are likely to be the models for Generation 2 Starter Pokemon in Pokemon Go. Here we go;

Page Contents  Chikorita, Bayleef, and Meganium modelsCyndaquil, Quilava, and Typhlosion modelsTotodile, Croconaw, and Feraligatr models Chikorita, Bayleef, and Meganium models

Cyndaquil, Quilava, and Typhlosion models

Totodile, Croconaw, and Feraligatr models

  Also, I have added a visual containing all three, Generation 2, Starter Pokemon together, and included their max CP in the table below.

Pok mon GO Generation 2 Starter Models - 21Pok mon GO Generation 2 Starter Models - 42Pok mon GO Generation 2 Starter Models - 13Pok mon GO Generation 2 Starter Models - 23