"Keep eating and you'll grow big and strong!"
Idea was suggested by Kido over on Tumblr.
I mean sure he assimilates metal/machinery to get big but gosh dangit if that small toy form didn't instantly make Galvatron squeal and his "MOMMA_BEAR.EXE" program activate to full capacity instantly.
Soundwave is smol shoulder son who gets snackies whenever he chirps.
also amusing, Extriverse!Soundwave adopts Galvatron, TFA!Galvatron adopts Soundwave...