Weapon	Skill	Attack	Where to Obtain
Spanner Knife	Double Slash	20	Original equipment
Smart Knife	Robo Retriever	32	Chest, Traste Mine
Short Sword	Triple Slash	42	Royal City, Santahre shops
Buster Knife	Hard Strike	50	Chest, Iltana Woods
Long Sword	Ground Sweeper	64	Caesius shop
Thunder Sword	Robo Shocker	76	Chest, Yurah Tunnel
Gladius	Hexa Slash	86	Porta shop
Blood Sword	Robo Sucker	120	Chest, Rudowa Pass
Buster Sword	Robo Bomber	108	Porta shop
Great Sword	Grand Buster	130	Biwal shop
Genocide Knife	Slice 'n Dice	144	Arena Exchange
Brave Sword	Raging Heart	160	Imperial City shop
Spark Blade	Robo Blitzer	242	Arena Exchange
Valtenia Sword	Robo Vacuum	180	Noredje shop
Crystal Sword	Razor Slicer	220	Royal City shop
Excalibur	X-Slash	260	Chest, DeInye Scrapyard
Ragnarok	Magnum Saber	310	Chest, Balco Woods blocked area
Enblaze	Platinum Shaft	360	Arena Exchange
Disarmonia	Ultima Slash	530	Caesius Inn, old man NPC, Rondylite required
Toy Sword	Innocent Heart	22	Subquest 16

(Note: From what I can tell, all except 2 are obtainable from monster drops.)

Weapon	Skill	Attack	Customize Added EXP	Where to Obtain
White Gloves	Clenched Fists	20	8	Original Equipment
Elastic Crystal	Sticky Stick	25	12	Chest, Bidahyl Cave Chest, Royal City Castle
Motion Crystal	Charge	30	20	Chest, Yurah Tunnel
Poison Crystal	Poison Attack	35	32	Chest, Nikka
Talon Crystal	Scratch	40	48	Chest, Traste Mine Chest, Ordo Quarry
Silence Crystal	Silence Attack	45	68	Chest, Santahre
Generator Core	Knuckle Sandwich	50	92	Monster Drop - see Bestiary
Paralysis Crystal	Paralysis Attack	55	120	Chest, Rudowa Pass
Confusion Crystal	Panic Dust	60	152	Chest, Caesius
Drain Crystal	HP Absorb	65	188	Chest, Skulge Fort
Psyche Crystal	SP Absorb	70	228	Chest, Ordo Quarry Chest, Royal Library
Break Crystal	Armor Break	75	272	Chest, Imperial City Castle
Dance Crystal	Battle Dance	80	320	Chest, Biwal
Beast Crystal	Bite	85	372	Monster Drop - see Bestiary
Fowl Crystal	Straight Descent	93	414	Chest, Kanbio Prison
Recovery Crystal	Treatment	101	459	Chest, Rudowa Pass
Reflect Crystal	Reflect Guard	109	507	Chest, Royal Library Chest, Mt. Valhyt
Upper Soul	Airborne	117	558	Chest, Rhani Cave
Giant Crystal	Stomp	125	612	Chest, Biwal Chest, Vole Tower Chest, Underground Installation
Pierce Crystal	Hurl	133	669	Chest, Ordo Quarry Chest, Mt. Valhyt
Fog Crystal	Absolute Evade	181	1074	Chest, Imperial City Castle Chest, Vole Tower Chest, Underground Installation
Berserk Soul	Rampage	149	792	Chest, Underground Installation
Death Crystal	Countdown	157	858	Chest, Royal Library
Sword Crystal	Amputate	165	927	Chest, Balco Woods
Accel Core	Triple Attack	173	999	Chest, Rhani Cave Chest, Mt. Valhyt Chest, Vole Tower
Missile Core	Missile	141	729	Chest, Mt. Valhyt
Adamantine Crystal	Mow Down	189	1152	Chest, Kanbio Prison
Dust Crystal	Sandstorm	197	1233	Chest, DeInye Scrapyard
Acid Crystal	Acid Rain	229	1317	Chest, DeInye Scrapyard
Lower Soul	Flick	213	1375	Chest, Noredje Chest, DeInye Scrapyard
Vulcan Core	Vulcan Cannon	221	1435	Chest, DeInye Scrapyard
Light Core	Laser Beam	205	1497	Chest, Noredje
Scale Crystal	Scale Shot	261	1561	Arena Exchange Chest, Vole Tower
Earth Crystal	X-Crusher	285	1627	Chest, Bidahyl Cave
Vile Crystal	Curse Invasion	293	1695	Monster Drop - see Bestiary
Typhoon Core	Blast Missile	277	1765	Chest, Balco Woods blocked area
Sharp Crystal	Storm Edge	269	1837	Chest, Kanbio Prison Locked Area Chest, Rhani Cave
Dark Crystal	Fireworks	237	1911	Chest, Kanbio Prison Locked Area
Hydrazine Core	Alpha Cannon	245	1987	Monster Drop - see Bestiary
Teardrop Crystal	Hydro Wave	253	2065	Chest, Kanbio Prison Locked Area Chest, DeInye Scrapyard
Inferno Crystal	Dragon Breath	301	2145	Arena Exchange
Negative Crystal	Inferno	309	2227	Monster Drop - see Bestiary
Thunder Crystal	Spark Viper	317	2311	Arena Exchange
Violent Crystal	Scramble	325	2397	Arena Exchange
Impact Core	Back Impact	333	2573	Arena Exchange
Load Crystal	Neo Inferno	341	2753	Arena Exchange
Magnetos Core	Omega Cannon	349	2937	Arena Exchange
Extinction Crystal	Phosphorescence	357	3125	Arena Exchange
Anathema Crystal	Last Sorcery	365	3317	Arena Exchange
Explosive Crystal	Big Bang	373	3513	Arena Exchange
Fierce Crystal	Final Eleven	381	3713	Arena Exchange
Stalling Core	Equal Absorb	428	3917	Arena Exchange
Demise Crystal	Last Inferno	439	4125	Arena Exchange
Specular Crystal	Mass Reflector	452	4337	Arena Exchange ONLY
Titanium Core	Overdrive	461	4553	Arena Exchange
Force Crystal	Hyper Impact	472	4773	Arena Exchange
Dark Crystal [Yes, again. They used the same name twice.]	Dark Inferno	482	4997	Arena Exchange
Vacuum Crystal	Absorbing Flurry	501	5225	Arena Exchange
Gemini Core	Sonic Barrage	513	5457	Arena Exchange
Void Crystal	Heartless Judgment	540	17088	Arena Exchange ONLY

Weapon	Skill	Attack	Obtain
Eleftherian Pistol	Doubler	38	Original equipment
Silent Ire	Silenced	42	Chest, Santahre
Santahre Revolver	Shadow Shot	60	Caesius shop
Shotgun	Spread Shot	52	Chest, Iltana Woods
Caesius Type-Q	Booster	80	Porta shop
Stun Gun	Stun Blow	92	Chest, Rudowa Pass
Phantom Ray	Magic Shot	100	Nikka shop
Glaive Wolf	Lonely Wolf	120	Biwal shop
Stinger	Sky Dive	122	Chest, Ordo Quarry
Valtenian Gatlinger	Random Shot	140	Imperial City shop
Tempest	Dead or Alive	134	Arena Exchange
Hunter x Hunter	Lucky Revolver	170	Noredje shop
Dandy Roar	Dandyism	232	Arena Exchange
Amorphis	Double Focus	210	Royal City shop
Skyfire	Zero Launch	248	Chest, DeInye Scrapyard
Storm Lord	Storm Shout	298	Chest, Balco Woods blocked Area
Terrorizer	Around Shot	348	Arena Exchange
Last Impaler	Banish Raid	506	Caesius Inn, old man NPC, Rondylite required
Cork Gun	Money Shot	20	Chest, Mt. Valhyt

Weapon	Skill	Attack	Where to Obtain
Large Memo Pad	What's that?!	54	Original Equipment
Old-Looking Book	This is a blessing from Gaia!	66	Chest, Caesius
Caesius Encyclopedia	What are you saying?	76	Porta shop
Refined Book	You got a thing for me?	89	Chest, Yurah Tunnel
Dated Dictionary	What's the matter?	98	Nikka Shop
Hardback Book	Look out!	130	Chest, Rudowa Pass
Thick Diary	You're bothering me!	120	Biwal shop
Thunderous First Edition	Nice!	162	Chest, Kanbio Prison
Magic Guide	My turn!	142	Imperial City shop
Highly Flammable Book	Burn baby burn!	126	Arena Exchange
Valtenian Treatise	No need to hold back!	170	Noredje shop
Paradox	Let's see what happens!	226	Arena Exchange
Statute Guidebook	Punishment from above!	202	Royal City shop
Thickest-Book-Ever	You're going down!	232	Chest, DeInye Scrapyard
Legendary Writ	Your power is mine!	282	Chest, Kanbio Prison Locked Area
Extreme Magic Manual	I can move!	342	Arena Exchange
Ultra Magic Tome	I'm invincible!	540	Caesius Inn, old man NPC, Rondylite required
Flimsy Book	Is this really okay?	16	Santahre. From Vyse, the NPC from subquest 14. (After defeating Lugner.)