I did not add how to obtain the status, most of them are one of a kind, given by an unique item or skill and some of them are veeery late game effects.
How to get rid a state: cure it / put the equipped item down/ exhaustion :D
Searching guide: because it is a very long list, I suggest using Ctrl+F !!!

Guideline:
Combat boost: generally something negative status in combat (possibly by an attack, you and the monster can get them!) If your are not resistant...
Fight boosts: generally something positive status in combat (ditto, monsters can buff too!)
Enchantment boost: generally something positive status all times gained by skill, item (but there are nasty effects too!)
One more thing: the percentiles are adding together: ST110% + ST120 = ST130%! But ST130% + ST90% = ST120%! (So if your Random has 500ST: 500*1,2 = 600ST)
This is the way of buffing, keep in mind!
STATUS EFFECTS:
COMBAT BOOSTS
ATTACK DOWN: ST40%
AURA BROKEN: MD50%
BLACK HOLE: Can't Use Spells MD40%
BLEEDING: Slip Damage 8% ST90% RS90% SP90% AT90% PD90% MD90%
BLINDNESS: Lower Hit Rate RS65%
BROKEN: PD65% MD65%
BURN: RS60% SP80% MN90%
CANCELLING: Rem. All Boosts
CAT PHOBIA: ST/RS/SP/MN75%
COLD: ST80% RS90% SP60% MN90%
CRUSHED WEAPON: AT50%
CRAZY FEAR: Can't Move RS80% SP80%
DEBILITY: Can't Use Spells MN30%
DEFENSE DOWN: RS40%
DELAY: SP40%
DEMOLITION: PD85% ST60% RS50% SP60% MN80%
DIMINUTION: ST90% RS80% SP80% MN90%
DISPERSION: MN70%
DISTRACTION: SP75% MN40%
DRUNK: Can't Use Spells ST125% RS140% SP40% MN50%
ENTANGLED: Can't Move
EXHAUSTION: Character cannot fight anymore
FATIGUE: ST80% RS90% SP75% (Lower Hit Rate?)
FEAR: ST80% RS85% SP80% MN90%
FLESH HUNTING: Can't Use Spells, Attack Enemies HP130% ST155% RS75% SP135% MN55%
FRAGMENTATION: AT90% PD80% MD90%
GLUE: Can't Move RS65% MD65%
GROUND LOCK: Can't Move
HELL CANCER: Slip Damage 15% HP200%
HELLOISM: Attack Allies, AT150% SP150%
ICE JAIL: Can't Move RS160% Can't evade, Remove Burn, Protect Fire/Earth
INSTANT BREAK: Can't Move
KAH'HUR OMEN: Can't Use Magic, Slip Damage 15%
KAOS: Can't Evade, RS20%
LICHEA: Slip Damage 15% ST80% RS70% SP80%
LIQUID CELLS: AT80% PD55% MD60%
MAALHEM POISON: Slip Damage 15%
MADNESS: Attack Allies
MAGICKA BLAST: MP25%
MAGICKA HOLE: MP40%
MAGICKA LOCK: MP0%
MALE POSSESSION: Attack Allies ST125% RS60% SP50% MN75%
METALLIST CURSE: HP90% PD30% MD30%
MIND DISABLING: Can't Use Spells SP90% MN50%
NAUGHTINESS: SP75% MN40%
PARALYSIS: Can't Move RS50%
PHAGOCYTOSIS: Can't Use Spells, AT/PD/MD/ST/RS/SP/MN80%
PLAGUE: Can't Use Spells, Slip Damage 10%, ST80% RS50% SP80%
POISON: Slip Damage 10%
POX: Slip Damage 9% ST80% RS80% SP80%, Evade -5
SAMUS SAMASCU: ST/RS/SP/MN45%
SHATTER: PD50%
SHRINKAGE: HP50%
SILENCE: Can't Use Spells
SLEEP: Can't Move RS50% SP50%
SLOW: ST80% RS80% SP40%
STONE: Can't Move RS180% MD120%
SURPRISE: Can't Move RS80%
THUNDER NUMB: Can't Move RS50% PD60% MD60%
UNDERWATER BURDEN: AT60% PD60% MD60% ST35% RS65% SP25%
VENOM: Slip Damage 12%, Hit Rate 90%, ST90% SP75%, Evade -15
WIRE SHOCK: AT85% ST95% SP80% MN95% PD/MD95%
WONDER LAND: ST90% SP80% MN55%
WRATH: Attack Enemies ST140% RS70% MN70%, Hit Rate 85%
BOSS BOOSTS
BLOOD FRENZY: Angry Hondler
INVINCIBLE Guidibba
KILLING MACHINE: Titanic
MANGLED GC
OVER POWER: ST200%
OVER RESISTANCE: RS200%
PROTECTED: RS/PD/MD150%
RAGE: ST125%
ROBOT-DEMI: PD/MD50%
VERY PROTECTED RS/PD/MD200%
WEREWOLF GOD HONDLER
X-DOMINION Double Stats
FIGHT BOOSTS
WEAPON BOOST: AT125%
WEAPON H-BOOST: AT150%
STEEL MUSCLES: ST125%
TITAN MUSCLES: ST150%
STEEL SKIN: RS125%
OBSIDION SKIN: RS150%
HASTE: SP125%
LIGHTNING SPEED: SP150%
BRILLIANT MIND: MN125%
GENIUS MIND: MN150%
(the last boost replaces the other!)
BARRIER: RS200%
BLOOD BUBBLING: ST105% RS110% SP120% MN115%
BRAIN BOOST: MP115% MN120%
CANCER BOOST: HP170% RS125% SP125% PD130% MD145%
CAT'O CRAZE: AT130% ST150% RS120% SP125% PD115%
CELESTIAN SHIELD: Prot. Elements PD105% MD105%
DAZZLE: SP140%
DEMENTED RAGE: AT120% HP135% ST135% SP135%
DODGING: Higher Evade
DUST WALL: RS110% PD103% MD103%
FAST 'N FURIOUS: AT125% SP125%
FIRE FRENZY: Attack Enemies, HP88% ST116% RS104% Sp134% MN76% MD105%
FROZEN: Can't Use Spells, Rem. Negative States, RS200% SP50% MN200% PD/MD200% (Herasia)
GAZ SHAPE: HP95% ST95% SP95% PD130% PD130% MD124%
GRAND PROTECTION: RS115% PD130% MD130%
ELEMENTAL SHIELD: Prot. Fire/Water/Air
HEROISM: ST125% RS125%
KILLER HIT: AT200% ST200% SP200%
MAGICKA DEFENSE: MD120%
MAGNET BODY: PD125% MD130%
MEGA POWER: AT120% ST/RS/SP/MN150%
OCEAN POWER: RS170% PD130% MD180%
OVER MAGNET BODY: PD135% MD145%
SAINT SHIELD: MD115%
SHAPE OF MIST: Higher Evade
TRANSLUCENT: +25 Evade
* RESISTANCE: *Air, Dark, Earth, Fire, Holy, Ice, Laser, Legend, Mind, Thunder, Water, Weapon Resistance
ENCHANTMENTS
ABSOLUTE FAITH: AT105% HP110% ST120% RS145% SP110% MN125% PD/MD105%
ACCURACY: Higher Hit Rate
APOCALYPSE: AT135% PD115% MD115%
ARACHNE SYNDROME: RS120%
ARMOR BOOST: PD117%
ASSASSIN STEALTH: SP140% MN110%
ASTRAL POWER: HP131% MP161% RS125% SP95% 165% PD135% MD140%
ATTACKER: ST125%
AURA OF LEGENDRA: AT106% ST105% RS107% SP103% MN109% PD108% MD104%
AURA OF THE DEW: MP130% SP85%
AURA OF THE SUN: HP135% MP155% MD120% RS120% MN120%
AQUALUNGER: HP150% MP50% RS200% SP80% PD150% MD70%
BADLY WOUNDED: HP75% ST80% RS90% SP80%
BANSHEE SPIRIT: SP125% MD115%
BARON WOLF: HP120% AT130% PD120% MD110% ST140% MD150%
BARRIER ZONE: RS125%
BEAST CRAZE: Can't Use Spells, Attack Enemies ST145% RS80% SP130% MN70%
BEAST INSTINCT: Can't Use Spells, AT110% ST110%
BLADE OF LAVA: AT200%
BLESS OF THE SUN: HP, MP, ST, RS, SP, MD 110%
BLOOD THIRST: Can't Use Spells AT130%
BOOSTER: AT110% HP122% MP112% ST110% RS115% SP115% MN110% PD110%
BRAVERY: ST115% RS110% (Prot. Fear?)
CAT'O CRAZE: ?
CHAMPION OF THE ORB: AT115% RS115% SP106%
CHAOTIX: Attack Enemies, HP133% AT121% PD107% MD88% ST124% RS107% SP128% MN94%
CLERICAL BLESSING: MP135% MN110%
COCKA-CRAZE: Attack Enemies, ST125%
COSMIC AURA: HP115% AT110% PD115% MD130% ST110% RS120% SP120% MN130%
COURAGE: AT110%
CRAZY IN LOVE: HP, MP, AT, PD, MD, ST, RS, SP, MN 200%
CRUSADER BLESSING: PD125%
D-GEN POWER: Slip Damage 15%
DARK AMBITIONS: Attack Enemies, AT105% HP130% ST135% RS145% SP95% MN90%
DARK FLAME: Attack Enemies, AT175% HP186% ST178% RS193% SP143% MN164% PD/MD114%
DARK MATTER: HP80% ST130% RS80% SP130%
DARYL'S FRIEND: AT/ST/RS/SP/MN110%
DEFENDER: RS125%
DEW: MN125%
EASY: ST/RS/SP/MN130%
ELEVATION: MP115% SP110%
ELVEN AURA: MP120% MD110%
ENCUMBEREMENT: ST80% RS70% SP45% (if you carry Random's statue)
ENERGY BURN: HP50% PD80% MD80% SP200%
ENERGYZER: HP125% ST125%
EXO BODY: PD125% ST125%
FAIRYHOOD: MP120% MN150%
FIRE BOOST: ST125%
FIRE MACHINE: HP200% MP50% MN50%
FLAMING WEAPON: AT165%
FLESH HUNTING: Can't Use Spells, Attack Enemies HP130% ST155% RS75% SP135% MN55%
FRIDGIA BOOST: MP136%
FROZEN BLOOD: Low Hit Rate, Can't Evade, HP20% ST/RS/SP/MN30%
GEOMANCY (FOG): AT110%
GEOMANCY (RAIN): ST110%
GEOMANCY (SNOW): MD110% MN105%
GEOMANCY (STORM): HP115% ST105% RS105%
GIANT BODY: HP150%
GLACIER SILENCE: HP150% SP60% PD120% MD140%
GLADENMORE BEST: RS140% PD120% MD120%
GLOWING AURA: AT119% MN109%
GODDESS HALO: AT120% HP140% MP150% ST120% RS130% SP120% MN140% PD/MD120%
GODDESS SPIRIT: MP115% MD140% MN160%
GRAVITY CRUSH: HP10% MP20% ST15% SP5% MN25%
GRAVITY PRESSURE: AT/HP/ST/RS/PD105% SP95%
HEAT: Prot. Cold/Slow
HERO PALADIN: AT115% PD110% MD110% RS110%
HIDING: RS130%
HUGE GORILLA: Low Evade, HP200% MP70% AT170% PD130% ST200% RS195% SP30% MN90%
IMMUNE: MD140%
INCREDIBLE BEAUTY: Even Magdalena notices your beauty!
INFERNO AURA: HP110% PD130% MD115% ST115%
INT. SEMINARY: MN200%
IRON WILL: RS110% MN105%
KAH'HUR TOY: HP150% MP85% ST150% RS75% SP150% MN70%
KIPA-KIPA: AT120% HP150%
KRONHART RESISTANCE: RS200%
KURU BLESSING: Prot. Pox/Venom MD140%
LAXIUS BOOST: AT105% HP200% ST115% RS120% MN145%
LEARNING: ST80% RS95% SP70% MN105% PD90%
LEGEND: AT120% HP110% ST115% SP145% MN110%
LEGEND SLAYER: HP150% AT120% ST125% SP120%
LIGHT FOOT: SP105% PD102% MD103%
LITTLE MONKEY: High Evade, SP130%
LOVE POWER: MP120% ST120%
LULLABY TRANSPERANCY: HP90% PD95% MD115% ST90% SP110% (Higher Evade?)
LUST POWER: ST/SP/MN110%
LYNX VIEW: Higher Hit Rate/Evade
MAGICKA LEAK: MP125%
MAGMA GLOW: HP130% ST145%
MAGMA SUMMONING: RS200% MN200%
MAGNITUDE: HP, MP, AT, PD, MD, ST, RS, SP, MN 110%
MERMAID EASE: Prot. Underwater Burden
METAL BIRD: HP110% AT115%
MUSHROOM GROWTH: HP116% MP107% PD104%
NA-HOOL BOOST: HP140% AT/ST/RS/PD120%
NEONIFICATION: MD102%
NIGHT SPIRIT: MP150% MD120% RS125% MN125%
NIMBLENESS: SP105%
OCEAN MANA: MP120% MN170%
PRESERVATION: HP125%
PSYCHE ENTROPY: MN120%
PURE BLOOD: Prot. Poison/Pox/Plague/Venom (Even Reeker Bulb!)
RESURGENCE: RS115% MN140% PD110% MD106%
ROLLER: SP140%
ROYAL AURA: AT105% HP115% ST/RS/SP/MN110%
SALT: RS115%
SAND: ST110% SP105%
SASQATCH BLOOD: HP112% SP109% PD105% MD102%
SHARK BLOOD: HP110%
SOUL PROTECTION: MD112% Prot. Exhaustion/Plague
SPEED RACER: AT115% HP110% ST120% SP150%
STR. SEMINARY: ST200%
STYX GLOW: AT120% HP135% ST135% MD120%
SUN: MN130% MD120%
SUPER WARMTH: SP/MN102% Prot. Cold/Shrinkage/Frozen Blood/Slow
SUPREM AURA: HP110% ST105% RS110% SP105% MN110%
SURVIVAL INSTINCT: HP135% ST180% RS185% SP155% MN125%
SYTRON FILTER: RS150% MN120% PD170% MD120%
TERRORIST: AT120%
THIEF STEALTH: SP108%
TIKOO-TIKOO: AT160% HP120% PD160%
TITAN BODY: HP200%
TRANSLUCENT: +40 Evade
TWISTED POSSESSION: Can't Use Spells, Attack Enemies HP115% AT109% PD101% MD101%
UNDERWORLD GUARD: HP130% MN140%
UNIVERSAL AURA: AT110% HP125% ST125% RS120% SP125% MN140% PD120% MD140%
YVEEN AURA: MP125% MN125% MD120%
YVEEN BLESSING: HP125% MD200% RS150% MN150%
VALUE: HP140% MP116%
VAPORISATION: RS140% SP120% MN110% MD120%
VIRTOUSITY: ST150% RS150% SP150%
WARMTH: Prot. Cold SP98% MN104% MD101%
WARRIOR PRIDE: AT120%
WEREWOLF: Can't Use Spells, Attack Enemies HP128% MP65% AT112% PD 105% MD95% ST155% RS110% SP156% MN90%
WILD GIRL: ST130% RS115% SP130% MN80%
WIND: SP120%
WOLF RAGE: HP120% MP80% ST130% RS90% SP130% MN80%
ZEN: RS106% SP95% MN116% PD101% MD103%
ZOMBIE VIOLENCE: AT105% ST115% RS106%
ZOMBO SPIRIT: MN144%
ZOMBIFICATION: Can't Use Spells HP142% AT125% PD105% ST152% RS135% SP80% MN95%
ZYZZYX POWER: N/A