>>44895422They really should have called them "Mega FORMS" so we wouldn't have to argue with autists like OP
Mega and Gmax follow a design philosophy of never straying too far from the base design. A Mawile evolution would look pretty different from M-Mawile, just like Gardevoir and Gallade look pretty distinct from Kirlia. They are more comparable to the X antibody forms from Digimon than outright true evolutions. It's like a half-step rather than a full one.