Joe and Mac (SNES Cheats)
Hidden Levels
On level 8, there is a red egg in the middle of the level. If you kill all the small dinosaurs before you crack it, you'll be flown to a hidden bonus level where you can powerup your weapon and collect a key to enter the blue dots on the map. On level 9, there's a red egg at the beginning of the level that also takes you to a hidden level.
Re-enter Dinosaur
When you are inside the dinosaur in the last stage, there is a way you can continue inside him if you die. When you are asked to continue, select "YES" and you will be shown on the map in the last white "continue" spot. Go to the last stage, and when you are in it, press START to pause the game, and then SELECT. You will automatically be transported inside the dinosaur without having to go through the stage and fight him all over again.
Max Out Your Lives
Go into a level that has a 1-Up in it. Finish the stage and go back in it. Find the 1-Up, collect it, then press START and SELECT to get out of the level.
Extra 1-Ups - Collect a key and go to the first blue spot on the map. Once in this bonus round, catch all of the meat that is dropped from the sky. A 1-Up will fall. Do not catch it. Let it fall and four 1-Ups will appear in its place.