The following is an overview of adjustments that have been made to drops or stats of vanilla pre-renewal monsters. They are categorized by the maps that the monsters are most commonly associated with. If you do not see a monster on this list, you can safely assume that it is the same as vanilla pre-renewal. For map adjustments, look at Map Adjustments, and for custom content, look at Custom Content. 
Cursed Abbey
| Banshee (1867) | 
| Change | Old | New | 
| Base EXP | 51,000 | 59,688 | 
| Job EXP | 36,000 | 45,645 | 
| Ragged Zombie (1865) | 
| Change | Old | New | 
| Base EXP | 25,500 | 35,001 | 
| Job EXP | 16,500 | 21,248 | 
| Necromancer (1870) | 
| Change | Old | New | 
| Base EXP | 135,000 | 156,801 | 
| Job EXP | 105,000 | 117,600 | 
Abyss Lake
| Gold Acidus (1713) | 
| Change | Old | New | 
| Base EXP | 84,129 | 67,302 | 
Ayothaya Dungeon
| Tamruan (1584) | 
| Change | Old | New | 
| Job EXP | 165 | 1,800 | 
Bio Laboratory
| Cecil Damon (1638) | 
| Change | Old | New | 
| Drop changes | Dropped Crossbow [3]. | Replaced with Gakkung [2] at 4.9% drop rate. | 
| Howard Alt-Eisen (1636) | 
| Change | Old | New | 
| Drop changes | Dropped Lord's Clothes [1]. | Replaced with Costume Test Subject Aura (Blue) at 0.1% drop rate. | 
| Kathryne Keyron (1639) | 
| Change | Old | New | 
| Drop changes | Dropped Old Blue Box. | Replaced with Old Purple Box at 4.9% drop rate. | 
| Drops Small Ribbons at 0.05% drop rate. | Drops Small Ribbons at 0.1% drop rate. | 
| Drops Shoes [1] at 1.75% drop rate. | Drops Shoes [1] at 3.94% drop rate. | 
|  | Added Magic Eyes to drop table at 0.5% drop rate. | 
|  | Added Red Mushroom Wine to drop table at 0.6% drop rate. | 
|  | Added Mysterious Test Tube to drop table at 0.5% drop rate. | 
| Margaretha Sorin (1637) | 
| Change | Old | New | 
| Drop changes | Dropped Rod [4]. | Replaced with Healing Staff at 9.61% drop rate. | 
|  | Added Rose of Eden [1] to drop table at 0.15% drop rate. | 
| Eremes Guile (1635) | 
| Change | Old | New | 
| Drop changes | Dropped Thief's Clothes [1]. | Replaced with Pantie [1] at 1.75% drop rate. | 
|  | Added Costume Eremes Scarf (Red) to drop table at 0.1% drop rate. | 
| High Wizard Kathryne [MVP] (1651) | 
| Change | Old | New | 
| Drop changes |  | Added Bazerald to drop table at 15% drop rate. | 
|  | Added La'cryma Stick [2] to drop table at 40% drop rate. | 
| Whitesmith Howard [MVP] (1648) | 
| Change | Old | New | 
| Drop changes |  | Added Hurricane Fury [1] top drop table at 15% drop rate. | 
Juperos Ruins
| Dimik [Earth] (1672) | 
| Change | Old | New | 
| Drop changes |  | Added Thunder P [2] to drop table at 1.75% drop rate. | 
Kiel Robot Factory
| Aliot (1736) | 
| Change | Old | New | 
| Job EXP | 12,018 | 27,018 | 
| Alicel (1735) | 
| Change | Old | New | 
| Job EXP | 16,260 | 20,460 | 
Louyang Dungeon
| Mao Guai (1513) | 
| Change | Old | New | 
| Base EXP | 12,069 | 23,745 | 
| Job EXP | 8,250 | 22,305 | 
| Attack range | 650-1010 | 455-656 | 
| DEF | 42 | 27 | 
| MDEF | 5 | 22 | 
| STR | 58 | 20 | 
| Drop changes |  | Added Rough Elunium to the drop table at 11.44% drop rate. | 
|  | Added Elemental Converter (Wind) to the drop table at 4.42% drop rate. | 
| Zhu Po Long (1609) | 
| Change | Old | New | 
| Base EXP | 9,090 | 14,163 | 
| Job EXP | 2,307 | 12,402 | 
| Attack range | 550-789 | 450-689 | 
| DEF | 39 | 29 | 
| MDEF | 10 | 19 | 
| STR | 55 | 20 | 
| Drop changes |  | Added Old Blue Box to drop table at 4.9% drop rate. | 
| Yao Jun (1512) | 
| Change | Old | New | 
| Base EXP | 6,597 | 15,972 | 
| Job EXP | 3,066 | 12,978 | 
| Attack range | 710-1128 | 410-628 | 
| DEF | 12 | 25 | 
| MDEF | 10 | 20 | 
| STR | 60 | 20 | 
| Drop changes |  | Added Rough Oridecon to the drop table at 11.44% drop rate. | 
| Green Maiden (1631) | 
| Change | Old | New | 
| Base EXP | 12,768 | 47,802 | 
| Job EXP | 2,760 | 47,802 | 
| Attack range | 460-1050 | 860-1050 | 
| DEF | 8 | 28 | 
| MDEF | 15 | 25 | 
| STR | 38 | 20 | 
| Drop changes | Dropped Studden Knuckle [3]. | Removed from drop table. | 
|  | Added Vali's Manteau to drop table at 1.75% drop rate. | 
|  | Added Elunium to drop table at 4.9% drop rate. | 
Morroc Pyramids
| Ancient Mummy (1297) | 
| Change | Old | New | 
| HP | 40,599 | 30,599 | 
| Base EXP | 24,120 | 91,797 | 
| Job EXP | 10,497 | 64,497 | 
| Attack range | 836-1129 | 1336-1529 | 
| DEF | 27 | 75 | 
| MDEF | 27 | 75 | 
| Element | Undead 2 | Undead 4 | 
| AGI | 19 | 119 | 
| VIT | 32 | 1 | 
| DEX | 83 | 123 | 
| Base Level | 64 | 74 | 
| Drop changes | Dropped Yellow Herb. | Replaced with White Herb at 100% drop rate. | 
| Dropped Rough Oridecon. | Removed from drop table. | 
| Dropped Rough Elunium. | Replaced with Elunium at 9.61% drop rate. | 
| Dropped Glove [1]. | Removed from drop table. | 
|  | Added Ring of Archbishop to drop table at 0.1% drop rate. | 
| Skill changes |  | Casts Defender and Reflect Shield on idle. | 
|  | Casts NPC Suicide if you cast Turn Undead or Ressurection on it (includes using Yggdrasil Leaf). | 
|  | Casts Level 5 Sonic Blow in attack state. | 
Odin Temple
| Skeggiold (1754) | 
| Change | Old | New | 
| Base EXP | 297,600 | 283,461 | 
| Skeggiold (1755) | 
| Change | Old | New | 
| Base EXP | 273,300 | 283,461 | 
Payon Dungeon
| Sohee (1170) | 
| Change | Old | New | 
| Skill changes | NPC Suicide has a 5% chance of use. | NPC Suicide has a 0.1% chance of use. | 
Rachel Sanctuary
| Agav (1769) | 
| Change | Old | New | 
| Base EXP | 29,340 | 49,761 | 
Thanatos Tower
| Baroness of Retribution (1702) | 
| Change | Old | New | 
| Base EXP | 84,996 | 100,332 | - | Drop changes | Drops Red Feather at 20% drop rate. | Drops Red Feather at 31.85% drop rate. | 
| Mistress of Shelter (1701) | 
| Change | Old | New | 
| Base EXP | 87,030 | 95,001 | - | Drop changes | Drops Red Feather at 10% drop rate. | Drops Red Feather at 16.94% drop rate. | 
| Lady Solace (1703) | 
| Change | Old | New | 
| Base EXP | 63,000 | 75,756 | - | Drop changes | Drops Blue Feather at 10% drop rate. | Drops Blue Feather at 16.94% drop rate. | 
| Dame of Sentinel (1700) | 
| Change | Old | New | 
| Base EXP | 119,616 | 149,757 | - | Drop changes | Drops Blue Feather at 25% drop rate. | Drops Blue Feather at 38.59% drop rate. | 
Thor's Volcano
| Kasa (1833) | 
| Change | Old | New | 
| Base EXP | 147,000 | 160,749 | 
| Job EXP | 114,000 | 144,000 | 
| Salamander (1831) | 
| Change | Old | New | 
| Base EXP | 216,000 | 244,833 | 
| Job EXP | 165,000 | 195,000 |