Battletoads

All you need to keep an eye out for is that when you have to duck and jump in Pimple's second and third rounds, hold down the input until the enemy is off the screen. Just tapping A or tilting the stick will still hurt you.

First of all, thanks for the guide, don't get why it got downvotes though 🤷‍♂️
Act III Stage 6 is the stage where you're playing with Pimple, OWTH & Bratty.
You have to punch,duck & jump with Pimple, chop wood with OWTH & take killer snapshots with Bratty & as the guide says it's as simple as completing it without failing a section, in other words simply don't lose all your energy which causes a fast restart, so fast that you might not even notice if you don't watch your energy, good luck