old game

[pepe]

help find an old sega mega drive game, there was a small flying green and yellow machine with wings and feet, with a small shop half way through alevel to upgrade body wings guns and stuff, you battle through each level with aboss at the end of each level, at the end you battle all bosses again one after the other. there was a circle with small cannons all the way around wich needed to be shot off, a metal flying fish, a metal ball with chains and smaller metal balls at the end like almiost like maces. and many other bosses but the only one i remember,