Hybrid

Hybrids are basically bots that carry different weapon systems, so a crossbreed between robot types.

I wouldn't recommend more than two weapon systems. Because even if a hybrid's greatest strength is versatility, it would be still weaker than a regular bot in each of his own weapon systems.

And also, i think it's funny to have a second weapon for a more elaborate tactic or just for backup, and it can be very helpful if you find yourself against a superior robot type (like facing a popup with a rammer)

EMERGENCY is a rammer/flipper hybrid, although it isnn't really a ram because it deals low damage, more than a pusher.

There are many, many types of hybrids, but only several are efficient. The others just have not

Rammer/Hammer Basically, a fast hammer with a frontal weapon rack. The tactic is to begin hammering after pinning your opponent, a thing rammers can do easily, and useful for pushers. However, they are not as maneouvrable as real rammers (because of the hammer head and the srimech that often fails) and pretty much unstable. Extremely efficient against horizontal spinners when these are not über stacked. Side hammer hybrids are stronger against vertical spinners and possibly popups (again, a weapon against your greatest enemy) and wipe out the instability problem and lack of invertibility.

Rammer/Poker : The best hybrid here isn't the fast poker, but a regular rammer with several pneumatic weapons. Foolishevil's bot RoAcH (Starcore 3) is a great design to start with. These basically add some bite to your rammer, provides you with a decent tossing agility, but also provide an additionnal weapon to a pusher, solving the issue of pushers doing low damage. Of course, your chasis is going to be big with all these motors, batteries and air tanks, so you'd better be on a weight diet for this hybrid. Useful against horizontal spinners.

Rammer/Horizontal spinner: A good design, these are fast horizontal spinners with several static spikes, or at the opposite, a rammer with two spinners. Horizontal spinners will be easier to fight with that. Basically adds speed and frontal defense to a HS, while of course weakening the spinner.

Horizontal spinner/Sit&Spinner: Several HS masters have used that design. A sit-and-spinning HS will make more damage at the cost of mobility. Just build a fast HS and give it a wide wheel stance.

Rammer/Sit&Spinner: While you can SnS with a pure rammer, it won't be very efficient and you risk losing a few wheels. For a true hybrid like this, you just need to give up a few spikes/axes on your ramming weapon and make a rear "tail" with weapons on it, or put weapons all around your bot (remember not to sacrifice your entire weapon rack). This is a powerful addition to a ram if you are fighting a wedged opponent (VS, popup), the ram's deadliest enemies.

Hammer/Poker: These types attack by pushing opponents into a wall or corner, then hammering down the wounded opponent. These bots are more than rare, and the best example is ScootOrDie, a DSL remake of a RA1 bot. Not extremely efficient because your hammers often bites the air if your pokers push your opponent.

As you can find, rammers are extremely easy to hybrid and a good addition to other weapon designs.

On another side, all vertical spinning weapons and Popups are very hard to hybrid, excepted perhaps with rammers.