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- Community run & moderated
- Chat. Get help. Share Monsters.
- World-wide fans & players MR Subreddit
- If Discord isn't your thing.
Community Tournaments
- PVP & Event Calendar
- Multiple Hosts, Games & Formats Challenges
- Speed Runs & Nuzlocke Social Media & Websites
- Official and Fan channels
Please Donate!
Your contributions help keep
the site and archives going!
Generate monsters at the Shrine/Altar! MR1 DX Song List (EN 2021) MR2 DX Song List (EN 2021) Ultra Kaiju MR Keywords (EN 2022) Ultra Kaiju MR Song list (SEA 2022)
MF1 DX CDデータベース (JP 2021) MF2 DX CDデータベース (JP 2021) ウルトラ怪獣MF 曲目リスト (JP 2022)
MR1 Make-A-Monster (NTSC 1997) MR2 Make-A-Monster (NTSC/PAL 1999)
MR Advance Keywords (EN 2001) MR Advance 2 Keywords (EN 2002)
Buy the Games!
(Non-Sponsored links)
Sale 11/01: Ultra Kaiju MR (Switch) MR1&2 DX (Steam) MR1&2 DX (Switch) MR1&2 DX (iOS)
Monster Rancher Advance 1 Raising Mechanics
An incomplete compendium of MRA1's hidden data and values of Actions and Items and other effects on your monster, transcribed from The Squirrel Of Damocles' data mining efforts. If you would like to help towards completing this information, please reach out!
Aroma's Comments
Fatigue Warnings
| Fatigue Message | Fatigue Value |
|---|---|
| Seems Really Energetic | 0 |
| Looks Pretty Lively | 1 to 19 |
| Seems to be in good shape | 20 to 29 |
| Seems kinda sleepy | 30 to 39 |
| Seems tired | 40 to 49 |
| Looks Really Worn Out | 50 to 69 |
| Looks Exhausted | 70 - 89 |
| About Ready to Collapse | 90 - 255 |
Stress Warnings
| Stress Comment | Stress Value |
|---|---|
| No Comment | 0 to 29 |
| But stress is starting to take it's toll -or- And Stress buildup isn't helping at all | 30 to 49 |
| But stress seems to be wearing it down -or- And stress is weighing heavily on it | 50 to 69 |
| But how does it cope with all the stress? -or- And it's dealing with a lot of stress | 70 to 255 |
Stress and Fatigue
A monster's lifespan value varies depending on its main and sub breed, of course. The average lifespan value for this game is 2220 (Divide by 10 and this is 222 weeks average lifespan). The Lifespan value not simply being "1 Week increments of time" allows for smaller than 1 week increments of lifespan adjustments.
The Lifespan Value goes down by 10 points every week by default.
An observation of Stress and Fatigue by bringing a monster to the weeks near the "It's been good to us for a long time" message.
The save is made on 1st week of may, thus this only tests if AT LEAST one week is lost if it retires on the 2nd week, it did NOT test the specific number of additional weeks lost, merely that more than the current week lived has been lost.| Stress | Fatigue | Survive? |
|---|---|---|
| 0 | 0 - 69 | Survive! |
| 0 | 70 - 255 | Retire |
| 0 - 69 | 0 | Survive! |
| 70 - 255 | 0 | Retire |
| 50 - 69 | 0 - 49 | Survive! |
| 50 - 69 | 50 - 255 | Retire |
| 0 - 49 | 50 - 69 | Survive! |
| 50 - 255 | 50 - 69 | Retire |
- If BOTH Stress AND Fatigue are over 49, you lose lifespan.
- If EITHER Stress OR Fatigue are greater than 69 you lose lifespan.
Other Notes:
Young monsters seem to get +1 to +3 Fatigue/week, +1 to +3 Stress/week. The cause unknown. Testing has proved unreliable for predictable results, but it seems to clear up within 2 to 3 months.
Fear and Spoil
| Comment | Reason |
|---|---|
| You're Spoiling [Monster] | Spoil value is 50 points higher than Fear value |
| [Monster] is afraid of you | Fear value is 50 points higher than Spoil value |
| Response | Fear | Spoil |
|---|---|---|
| Praise Great | 2 | 3 |
| Withhold Praise | 3 | -7 |
| Scold Fail | 5 | -7 |
| Don't Scold | - | 3 |
- Roast Newt: +10 Fear, -15 Spoil
- Rest: -2 Fear, +3 Spoil
- If your style is strict add a small amount of stress (+1 to +3) per week!
Item Values
| Food | Price | Form | Protein | Minerals | Vitamins | Fatigue | Stress | Stress (Liked) |
|---|---|---|---|---|---|---|---|---|
| Potatoes | 30 | 0 | 0 | 2 | 5 | -1 | -1 | -3 |
| Fish | 120 | 3 | 8 | 6 | 0 | 0 | -2 | -4 |
| Meat | 200 | 6 | 12 | 0 | 0 | -3 | 0 | -2 |
| Orange | 80 | -1 | 0 | 5 | 6 | 0 | 0 | -2 |
| Nuts | 70 | 1 | 4 | 7 | 2 | -1 | 0 | -2 |
| Jelly | 60 | 2 | 0 | 0 | 12 | 0 | 0 | -2 |
| Banana | 40 | 0 | 0 | 1 | 6 | -2 | -2 | -4 |
| Milk | 100 | 0 | 0 | 10 | 6 | -4 | -3 | -5 |
| Nutrients | 180 | 4 | 10 | 10 | 10 | -2 | -2 | -4 |
| Nothing | 0 | 0 | 0 | 0 | 0 | 0 | -6 | -6 |
| Item | Fatigue | Stress |
|---|---|---|
| Nitro Berry | - | -10 |
| Honey Candy | -1 | - |
| Mango | - | - |
| Cookie | - | - |
| Newt | - | - |
| Item | Fatigue | Stress |
|---|---|---|
| Mint Leaf | - | -15 |
| Mint Candy | -1 | -20 |
| Torles Water | -10 | - |
| Nuts Oil | -20 | - |
| Item | Fatigue | Stress |
|---|---|---|
| Silver Cup | 0 to -1/wk | - |
| Gold Cup | 0 to -3/wk | - |
| Holy Cup | -1 to -5/wk | - |
| Shiny Gem | - | 0* |
| Sparkle Gem | - | 0 to -2/wk |
| Bright Gem | - | 0 to -3/wk |
* Testing indicates this item is broken.
| Resting Scenario | Fatigue | Stress |
|---|---|---|
| Default | -50 to -55 | -12* to -16 |
| Rest + Incense | -51 to -56 | -13 to -18 |
| Rest + Aroma Pot | -52 to -60 | -13 to -20 |
Notes for Food Items:
- How well liked or nutritious it is seems to have no effect on fatigue.
- Stress results of happy or ecstatic will vary; Meat ,for example, can give -6 on "Happy" and -10 "ecstatic" but one can also observe -10 "Happy". This needs more testing.
Drills & Battles
This section was only tested with 1 monster and needs additional testing
Drill Greats and Fails are untested, as are Rain, Snow, or Hot days. From testing, it would seem that your coach monster, monster's age, training aptitude are irrelevant to stress and fatigue for drills.
| Drill Success | Fatigue | Stress |
|---|---|---|
| Light Drill | +13 to +16 | +5 to +8 |
| Heavy Drill | +26 to +29 | +10 to +13 |
| Response | Fatigue | Stress |
| Praise Great | - | -5 |
| Withhold Praise | - | +3 |
| Scold Fail | - | +7 |
| Don't Scold | - | -2 |
| Placing | Fatigue | Stress |
|---|---|---|
| 1st | +31 | -40 |
| 2nd | +40 | -32 |
| 3rd (not validated) | - | - |
| 4th | +42 | -30 |
Special Training
- Fatigue: +39 to +47
- Stress: +2 to +11
Credits: Transcription (with permission) of The Squirrel Of Damocles' paste bin notes and data mining efforts.
This page was last modified: June 02 2025