Cross Attacker

Cross Attacker is a Biklone consisting of the Direwolf Clone and Sabertooth Clone. Much like Biklone Eclipse, this means that it is piloted by Biklonauts Gio and Reo, and managed by sysops Loki and FX.

Cross Attacker has two trusty weapons; though they can be used in melee combat, they're best used for ranged attacks. Mostly fiery attacks. Like... a lot of fire. Especially when you put them together. Then that's a lot of fire.

Attack Lineup
One of Cross Attacker's weapons. As it is based on the Sabertooth clone's Fatal Slasher, it is activated by Reo, though the weapon and hand that holds it are both from the Direwolf clone.
 * Fatal Blade

The main feature of the Fatal Blade is its ability to throw fire slashes at the enemy, often in a cross-shape to further emphasize the whole "Cross" Attacker thing. These fire slashes are quite powerful and can cut through enemy defenses that can withstand most other attacks, like the Domabewakhan's chin scales. Additionally, it is a blade, so it can be used for melee combat if needed.  Cross Attacker's other weapon. As it is based on the Direwolf clone's Fireball, it is activated by Gio, though conversely to the Fatal Blade, the weapon and hand that holds it are both from the Sabertooth clone.
 * Pyro Drive

The Pyro Drive is a fireball-blasting gun held upside-down (and not a baton/truncheon/whacking stick like so many different toy reviewers and eventually Young Toys themselves claim it is), capable of launching stronger fireballs than that of the Direwolf clone at a generally faster pace.

Though the Pyro Drive is typically used after the Fatal Blade because the positioning of the weapons means that the Fatal Blade comes off of Cross Attacker's back first, it can be used on its lonesome, though how it gets released without the Fatal Blade also moving out of the way is a mystery.  The combined weapon of Cross Attacker and subsequently its finisher. It may be obvious, but the Fire Blade is formed by combining the Fatal Blade and Pyro Drive. The typical process involves Cross Attacker sticking the Fatal Blade into the ground and then connecting the Pyro Drive to it, releasing a burst of fire as it wields its new two-handed longsword. When Cross Attacker swings the Fire Blade in any particular fashion, the weapon spreads a large amount of highly-destructive fire. If the Fire Blade hits the ground, the fire quickly spreads through several meters worth of ground in front of it, decimating anything nearby.
 * Fire Blade

The weapon was not used until season 5, though it was brought up by Gio in season 4; Loki mentioned that Cross Attacker's finisher was too dangerous to use without practice, and given the results in combat, this was probably very true.

With all that being said, the Fire Blade can actually be used without any fire surrounding it, though that's usually for less interesting reasons, like cleaning up volcanic rock from the streets after a fiery battle. 

Toy
This is a set of both the Direwolf and Sabertooth toys with all functionality intact, though the Direwolf and Sabertooth disc chips have been swapped out for the Cross Attacker one. Once combined, the soundbox in Direwolf will activate, and the toy will play sounds when the blue button on its rib is pressed.
 * Mega Beast Cross Attacker/메가비스트 크로스 어택커 (2015)
 * Accessories: Cross Attacker Disc Chip

The sounds are as follows:
 * Biklonz Mega Beast! (when combining, when button is pressed after an extended period of time)
 * Mega Beast, Cross Attacker! (Gio and Reo)
 * Fatal Blade! (Loki and FX)
 * Pyro Drive! (Loki and FX)
 * Fire Blade! (Loki and FX)

Cross Attacker's arms rotate and swivel under them. The wrists turn, the hands open, the legs can move forward, backward, in and out, the knees are double-jointed, the heels can be pulled forward if you can find any use for that, and the head turns. The knee joints are somewhat weak, however, so holding poses might be difficult.

The Fatal Blade, Pyro Drive, and Cross Attacker Disc Chip are all stored on its back. Cross Attacker can wield its weapons and form the Fire Blade, though its hands have some trouble holding onto them.

Cross Attacker drew a lot of global attention from collectors due to it essentially being the first properly documented cross-combiner on record, and a great one at that (after which Bandai realized they'd been outdone by a Korean toy company and proceeded to make up for it by making two of them).