goomba are the common emeny that are in mario series, and his first appear are in super mario bros 1, this page see his appearnce in smbx
Super Mario Bros 1
he like all goomba, he can get stomp and killed, there is have a blue goomba called gloomba that only appear in underground
Super Mario Bros 3
he change appearnce in Smb3 that you can see his tooth from the mouth, now have para-goomba,red goomba in this appearnce is like other goomba, but when he is winged, he don't fly, he jump instead
Super Mario World
his appearnce is round, face left and right, now when stomp, he will filp upside-down, you have to kill with power-ups, when he are winged, he jump instead of fly