This was a PC or Master System game 17+ years ago.
It was a side scroller/platformer where you had some items at first (a whip, a bomb, a jumping pole) then you entered kind of a castle and there was a monkey that'd jump around and steal one of your items if he touched you, you always had to use the pole to jump around.
Then out of the castle you'd fight a lion, then get to a dungeon you turn into a frog for a while, then to a butterfly (and I guess I never got past that part).
It was a side scroller/platformer where you had some items at first (a whip, a bomb, a jumping pole) then you entered kind of a castle and there was a monkey that'd jump around and steal one of your items if he touched you, you always had to use the pole to jump around.
Then out of the castle you'd fight a lion, then get to a dungeon you turn into a frog for a while, then to a butterfly (and I guess I never got past that part).