I am looking for a NES game.

I used to have this NES game where you could play as four different characters, three of them were different kinds of dinosaurs and the fourth was a human, I think a little boy. But I think you could switch on the fly and needed to use them all to get past certain parts of the level. It was the classic 2D side scroller, any ideas?

Little Samson.

Oh man, I have been looking for this game for so many years, you don't even understand. Thank you SO MUCH!!!!

No problem.