All officially released Pokemon to scale. Measurements are interpreted as such:
If Pokemon is bird-, bat-, pterosaur- or insect-like (where wings are of considerable size), wingspan is used (exceptions are made for the firsts in the evolutionary line i.e. pidgey, etc and Mega Pinsir)
If Pokemon is serpent like, length from head to tail tip is used.
If Pokemon stands on two feet, height from bottom of feet to top of head is used.
If Pokemon stands on multiple legs, longer measurement between height (foot to head) and length (head to behind hind legs) is used.
A two-tone color scheme is used to indicate a Pokemon in an increased overall stat form or form change induced by item (i.e. mega evolutions, distorted world form, fusions, etc.)
Trainers and professors are shown for size comparison at the top. Their heights are roughly:
5'0" (1.52m) for female trainers
5'6" (1.67m) for male trainers
6'0" (1.82m) for professors
Previous mistakes have been corrected, but some may still exist that I haven't caught. Feel free to comment.