Double Techs

Crono-Marle

Aura Whirl- same as Aura, but heals all allies. Marle casts Aura and Crono does his Cyclone attack to spread it around to all allies. Recover
Crono: Cyclone
Marle: Aura

Ice Sword- Marle casts Ice at Crono's sword, which he then uses to cut the enemy. Only affects one enemy. Ice attack
Crono: Spincut
Marle: Ice

Ice Sword 2- Same as Ice Sword, but more powerful and with more ice. Can hit multiple enemies if they're close enough together. Ice attack
Crono: Confuse
Marle: Ice 2

Crono-Lucca

Fire Whirl- Same basic concept as Aura Whirl, except you're using Fire... heh, heh, heh. Fire attack.
Crono: Cyclone
Lucca: Flame Toss

Fire Sword- Same concept as Ice sword, but with Fire. Lucca casts Fire on Crono's sword and a ring of fire encircles the enemy before Crono slashes it. Fire Attack.
Crono: Spincut
Lucca: Fire

Fire Sword 2- Same as Fire Sword except when Lucca cast Fire2 on Crono's sword, multiple rings of fire swirl around his sword before he slashes the enemy. Fire attack.
Crono: Confuse
Lucca: Fire 2

Crono-Robo

Rocket Roll- Crono hops on Robo's shoulders and they spin around, creating a laser-like energy that attacks all enemies at once. Fire attack
Crono: Cyclone
Robo: Laser Spin

Max Cyclone- YES! I love this one! Robo grabs crono by the legs and spins him around till he pukes on the enemy... Just kidding. Robo grabs Crono by the legs and spins him around with his sword outstretched. Affects only the enemies nearby. Attack.
Crono: Spincut
Robo: Laser Spin

Super Volt- Bzzzt!! Heh, heh. Cool. This is basically a lightning attack that looks really cool when you use it. Lightning attack.
Crono: Cyclone
Robo: Shock

Crono-Frog

X-Strike- Crono and Frog both strike the enemy in an X shape. Effective, but not that interesting. It's an easy way to kill that pesky Yakra at the beginning of the game in only a few turns, though. Also works well on Slash and Flea in Magus's castle. Attack.
Crono: Cyclone
Frog: Slurp Cut

Sword Stream- Crono leaps at the enemy while Frog casts Water. A water bubble forms at the tip of Crono's sword before he plunges it into the enemy and creates a stream of water from the broken bubble. Water attack.
Crono: Spincut
Frog: Water

Spire- The all new hidden object games coolest magic attack besides Max Cyclone. Frog leaps at the zetaclear and scam enemy and plunges his sword in then leaps to one side. Crono cast lightning on the sword and does lots of damage to the enemy. Very effective on the Giga Gaia (once you destroy his hands, that is). Lightning attack.
Crono: Lightning 2
Frog: Leap Slash

Crono-Ayla

*Since Ayla doesn't use magic, most of her double/triple techs either don't use magic, or they use the magic of her tech partner.*

Drill Kick- Ayla jumps onto the end of Crono's sword and he spins her around before throwing her up in the air to deliver a mighty kick to the enemy's bum. Attack.
Crono: Cyclone
Ayla: Rollo Kick

Volt Bite- Crono zaps Ayla with a bolt of Lightning before she delivers a powerful bite to the enemy. Bzzzt!!! Heh, heh. Lightning attack.
Crono: Lightning
Ayla: Cat Attack

Falcon Hit- Ayla throws Crono into the air and he flies toward the enemy with his sword at the ready. Very effective on the Giga Gaia when you need to destroy both arms in a flash. Attack.
Crono: Spincut
Ayla: Rock Throw

Marle-Lucca

*All of these are Antipode attacks- that is, both fire and water attacks. No, these don't work on those little red and blue sentinels in the ocean palace. It just makes things worse...*

Antipode- Marle uses Ice to freeze the enemy and Lucca uses Fire to roast them. Shadow attack.
Marle: Ice
Lucca: Fire

Antipode 2- Same as above except it's more powerful and looks cooler. Shadow attack.
Marle: Ice 2
Lucca: Fire 2

Antipode 3- The coolest one of em all, ya'll. Same as before except it's way more powerful and it kicks more, well, you know what. Shadow attack.
Marle: Ice 2
Lucca: Flare

Marle-Robo

Aura Beam- Same concept as Aura Whirl except Robo's the one who's pairing up with her. Heal.
Marle: Aura
Robo: Cure Beam

Ice Tackle- Marle casts Ice on Robo who then tackles the enemy. Ice.
Marle: Ice
Robo: Robo Tackle

Cure touch- Marle and Robo team up to cast a powerful cure spell on the group. Heal.
Marle: Cure 2
Robo: Heal

Marle-Frog

Ice Water- Frog makes a water bubble, Marle shoots an ice cube into it and it drops on the enemy. Water/Ice attack.
Marle: Ice
Frog: Water

Glacier- Kinda like a large-scale Ice water attack. Water/Ice attack.
Marle: Ice 2
Frog: Water 2

Double Cure- Completely cures everyone in the party. Very useful and uses less MP than Glacier. Heal.
Marle: Cure 2
Frog: Cure 2

Marle-Ayla Twin Charm- Ayla and Marle team up to charm a whole bunch of stuff from the enemy- usually it's only a few items, but hey! It's better than nothing, right? Assist.
Marle: Provoke
Ayla: Charm

Ice Toss- Marle throws a giant block of ice at Ayla who then throws it at the enemy. Ice attack.
Marle: Ice
Ayla: Rock Throw

Cube Toss- Marle throws more ice at Ayla and Ayla throws it at the enemy- does more damage than Ice toss. Ice attack.
Marle: Ice 2
Ayla: Rock Throw

Lucca-Robo

Fire Punch- Lucca throws some fire at Robo's fist before he punches the enemy. Fire attack.
Robo: Rocket Punch
Lucce: Fire

Fire Tackle- Lucca casts Fire on Robo before he tackles the enemy. Fire attack.
Robo: Robo Tackle
Lucca: Fire

Double Bomb- Lucca and Robo both use their most powerful bombs to blow the enemy into next Thursday- no, wait. Into the next Millineum. Yeah, that's more like it. Fire attack. Robo: Area Bomb (uses 14 MP) Lucca: Mega Bomb (uses 15 MP) Lucca-Ayla

Flame Kick- Just likw it sounds- Lucca casts a flame at Ayla and Ayla kicks the enemy. Simple as that! Fire attack.
Ayla: Rollo Kick
Lucca: Fire

Fire Whirl- Lucca casts Fire on Ayla and Ayla does Tail Spin to do some fire damage type stuff to the enemy while they're flying around in a tornado. Fire attack.
Ayla: Tail Spin
Lucca: Fire 2

Blaze Kick- Same as Flame Kick, but Ayla uses her Triple Kick to do more dammage. Fire attack.
Ayla: Triple Kick
Lucca: Fire 2

Robo-Frog

Blade Toss- Robo Tosses Frog up in the air for a Leap Slash type of attack. Attack.
Frog: Slurp Cut
Robo: Laser Spin

Bubble Snap- Frog casts a water bubble onto Robo, who climbs in and then drops on the enemy. This is exactly like Bubble Hit (Frog & Ayla) with the exception that Robo is in the bubble, not Ayla. Water attack.
Frog: Water
Robo: Robo Tackle

Cure Wave- Robo and Frog team up to cast a cure spell on the entire group. Recover.
Frog: Cure 2
Robo: Heal Beam

Robo-Ayla

Boogie- Here's an interesting one: Ayla and Robo do this psychotic dance that casts a haste spell on the entire group... I think. I've never actually used it, but it is an interesting spell. Assist.
Robo: Robo Tackle
Ayla: Charm

Spin Kick- Robo throws Ayla towards the enemy in a spinning kick. Attack.
Robo: Robo Tackle
Ayla: Rollo Kick

Beast Toss- Robo and Ayla both throw enemies up into the air. Woohoo. It's a team effort style Rock Throw. Attack.
Robo: Uzi Punch
Ayla: Rock Throw

Frog-Ayla

Slurp Kiss- A combination of Slurp and Kiss in an Aura Whirl style spell. Heals the entire group. Recover.
Ayla: Kiss
Frog: Slurp

Bubble Hit- Frog puts Ayla in a bubble and she drops on the enemy. Exactly like Bubble Snap... Water attack.
Ayla: Rollo Kick
Frog: Water

Drop Kick- Frog and Ayla pair up to drop on the enemy- Ayla kicks 'em, frog slashes 'em. Attack.
Ayla: Triple Kick
Frog: Leap Slash

Lucca-Frog

Red Pin- Lucca casts Fire on Frog before he leap slashes the enemy. Fire.
Frog: Leap Slash
Lucca: Fire

Line Bomb- Lucca tosses frog a bomb and then he does a Falcon hit style Leap Slash while bombing the enemy. Hence the name- Line Bomb. Fire.
Frog: Leap Slash
Lucca: Mega Bomb

Frog Flare- You know that huge frog that Frog summons? Well- Lucca casts fire on it while it squashes the enemy. Very cool... Uses a buttload of MP though, so be aware. Fire.
Frog: Frog Squash (uses 15 MP)
Lucca: Flare (uses 20 MP)