Lakitu and Spiny
These guys were more annoying than deadly. Just had to time the stomp when they are not tossing Spiny Eggs at you.
Lakitu is a Koopa with a green shell, orange or yellow body, glasses or goggles with thick black frames, and is usually seen flying in a cloud bearing a smiling face. In its role as an enemy character, Lakitu typically flies about and throws Spiny Eggs at Mario, although variant types employ other attack patterns. The Spiny Eggs hatch into Spiny, a small, red, spike-backed Koopa creature, that is thrown indefinitely until the Lakitu is defeated. Depending on the game, the Lakitu's Cloud can be ridden for a limited time after it is defeated. When asked what video game character would represent him the best, Shigeru Miyamoto responded that Lakitu would, as he "seems to be very free, floating in the air, going anywhere," a type of personality Miyamoto can apparently relate to.