Crafted from a Bottle Rocket and Radar Notes, the Homing Missile is a nice upgrade of the Active Buster from the first game. Its upgrade costs stack up to a rather expensive 2,950,000z, which makes it the 3rd most expensive weapon in the game. Thankfully, you get this early on in the game and can upgrade it as you progress.

The Homing Missle causes Megaman to fire a small projectile that homes in on the opponent. Very simple, yet very useful. They can be upgraded to do rather nice amounts of damage, and the energy can be made infinite as well, which really helps. They also break the Gorubeshu's shields, as well as other defenses.

This is probably one of the most versatile weapons in the game, as it pretty much aids you from the time you get it towards the end of the game. You can also run while firing it, which is great for when you need something other than your buster to fire at an enemy/boss. Speaking of bosses, most of them go down pretty easily with this weapon equipped. Because of the fact that you can you can upgrade the energy to infinite, you have more room for error when usuing this, which is nice for beginners as well.

In lieu of downsides, there really aren't many. You may have problems trying to catch the Glyde Drache's on Nino Island (something you may want the Buster Cannon for), and it also has a bit of recharge time on it, although with infinite energy you can simply use your buster while you wait. It is somewhat expensive, but MML2 has a couple of nice places for you to nicely build zenny.

The Homing Missile is a great weapon, with very few downsides. Its versatility makes it a great weapon to use for all parts of the game, and infinite energy just makes it even better! The Homing Missle gets a perfect 10 from me, because it's just all-around awesome.