Okay, I made a lsting of all the ÄRMs I could. They are seperated into different categories (they will be in order of appearances within the categories). This should be all the ones used up to end of volume 6, but I may have missed some. I will go through and get the volumes 7 ones and later ones from my Shounen Sunday. Version 5 babbo is from later than 7.
UNCLASSIFIED ÄRM
*Babbo-the only one with the ability to talk; he posesses at least four known forms (using magic stones to create them): Version 1 Hammer Arm, Version 1 B Dagger Arm, Version 2 Bubble Launcher, Version 3 Gargoyle, Version 4 Alice, Version 5 Cushion Jelly; he's hard to class because he not only talks but he has a varitey of abilities as well including summoning, weapon-like qualities, shielding, and magic attacks; looks like a ball and cup game; used by Ginta
*Majic Carpet-one with that when called creates a magic carpet to fly on; not classed because class never given; original form: chain; used by Ed
GUARDIAN ÄRM
Note: Guardians are summoning ones
*Ring Guardian-summons a beast covered in Armor; medium level summon; original form: ring; used by Dorothy (breaks)
*Flying Leo- summons a giant flying lion; original form: bracelet; used by Dorothy (breaks)
*13 Totem Pole Chain- summons a giant tower of 13 totem poles; each pole can be used seperately; ability: rod version; original form: chain; used by Alviss
*Snowman- summons about a six foot snowman; given the nickname Yuki-chan; can become more than one; can become giant; abilites: shield, smash; original form: necklace; used by Snow-hime
*Stone Golem- summons a giant stone golem; left in charge as Guardian of one of the two training temples; original form: chain; used by ?
*Meriro- summons a cat girl; used as a guide for one of the two temples (specifically Ginta's and Snow-hime's); a very human summon; original form: chain; used by ?
*Bakyua- summons a slime monster; abilities: melt other guardians, break apart in defense; has one eye; original form: chain; used by Maira (breaks)
*Burikin- summons a gaint golem of armor; brute strength; original form: bracelet; used by Dorothy
*Lion Dog- summons a giant dog and lion halfbreed; named Toto; powerful teeth; has the ability to talk (the summon); original form: chain; used by Dorothy
*Magic Lamp- summons a large magic lamp; the lamp in turn summons a genie; original form: ring; used by Alibaba
WEAPON ÄRM
Note: summons a weapon
*Ring Dagger- summons a small dagger; original form: ring; used by Dorothy
*Battle Scoop- summons a shovel; abilities: Earth Beans, Magical Mushrooms; used as a weapon or to summon magic attacks; original form: bracelet; used by Jack
*Dagger Bracelet- summons a dagger; original form: bracelet; being sold when Ginta and Jack are looking for a Dimension ÄRM
*Necklace Blade- summons a blade, original form: necklace; used by members of Nanashi's group when;they first try to steal babbo from Ginta
*Octopus- summons eight sharp whip-like blades; original form: chain; used by Ian
*Python Whip- summons a snake-whip; original form: bracelet; used by Ed
*Ball Hammer- summons a pole with a giant ball on the end of it; abilities: ball can come off and be a projectile, ball can split into four pieces; original form: kept in its summoned form; used by Pan
*Screw Saber- summons a curly thin-bladed sword; original form: bracelet; used by Mr. Hook
*Anger Anchor- summons a giant anchor; original form: ring; used by Mr. Hook
NATURE ÄRM
*Fire- summons fire magic; never leaves orignal form; original form: charm; owned by Ed but given to Ginta to save Snow
*Ground Scoop- summons earth powers; used to break the earth apart and do damage to the oponent; orignal form: pendant; used by: Jack
*Electric Air- summons electricity; used as a projectile-like weapon; original form: two rings; used by Nanashi
*Iced Earth (1)- summons ice; freezes ground and opponent; orignal form: ring; used by Giromu
*Flame Ball- summons fire; can take on the form of two blades; mainly attacks using fire balls; orignal form: two rings; used by Ren
*?- gives user incredible strength; two different sets; orignal form: five rings for one hand, five different ones for the other; used by Garon
*Winda-ruwu- summons wind; abilites: wind cutter, tornado (x 4); orignal form: bracelt; used by Fuugi
* Iced Earth (2)- summons ice; similar to Iced Earth (1); orignal form: chain; used by Snow-hime
*Ice Ring- summons ice; can freeze or become a blade; orignal form: ring; used by Snow-hime
DARKNESS ÄRM
*?- summons an illusion of ghost and hellfire; orignal form: ?; used by Alviss
* Caged Bird- turns target into a bird in a cage; orignal form: ring; used by Alviss
*Curse of the Straw Puppet- summons a giant vodoo doll; user sticks nails into the doll and it effects opponent; original form: necklace; used by Loco
*Body Candle- summons a waxy like substance to cover the body along with a wick; basically turns user into a lit candle; can be used to cover the opponent in wax to slow movement and burn; orignal form: ring; used by Kanocchi
HOLY ÄRM
*Scorn of the Angel (or Humble Angel)- summons a warm light used for healing physical injuries; original from: necklace; used by Ian, given to Ed, used by Snow-hime
DIMENSION ÄRM
*Gate Watcher Piero-summons a dimensional gate and its watched Piero; used to bring people from one world to another (in this case Ginta); original form: ring; used by Alviss (breaks)
*Training Gate-summons multiple doors that lead to different training grounds (temples); in this case two used: Snow and Ginta through one, Jack and Dorothy through the other; original form: chain; used by Ed
*Andarta-summons the user and all else desired fromt heir position to another in the current world; original form: ring; used by Nanashi
*Zipper- summons a giant zipper that rips through the dimensional fabric into basically empty space; can be used in combination with Guradians; orignal form: ring; used by Dorothy
Later I will try to get pictures up for each of these and I'll add on to the lsit as well