Monster Rancher DS Lifespan Information

Each monster has a lifespan which determines how long it will live. Stress, fatigue, tournaments, and the progression of time lower your monster’s remaining lifespan.

When your monster starts a week with its lifespan at 0, they will die.

Monsters tend to live between 3 years and 5 years of age, but that will vary based on the monster’s main and sub-breeds as well as how you raise them. Raising your monster poorly can greatly decrease their lifespan, while raising them effectively can make them live up to their potential.

Monsters lifespans are unaffected over time when they are frozen in the Studio.

Cleo will warn you when your monster’s lifespan drops below 25% of its starting lifespan.

Um, [PLAYER]? This isn’t easy for me… But maybe it’s time to let [MONSTER] go. It’s starting to slow down, and…I think it’s just getting too old. The best thing to do would be freeze and combine it at the Lab.

Even when you get this warning, you still have quite a bit of time left with your monster. Depending on your monster’s starting lifespan and how you raise them, they may have many months or even longer than a year left to live.

There are several things that impact your monster’s lifespan:

• Time passing causes your monster’s lifespan to decrease based on its stress and fatigue
• Going on drills and Errantry impacts lifespan slightly differently than normal time passing
• Participating in tournaments decreases your monster’s lifespan
• Certain items can increase or decrease your monster’s lifespan

Weekly Decreases

At the start of every week, your current monster’s lifespan decreases by a base amount of 10. Their lifespan is then further decreased based on the monster’s current stress and fatigue.

So for example, if your monster has a stress level of 50 and a fatigue level of 350 then your monster’s lifespan will decrease by 12 (-10 + 0 + -2).
In the worst case, your monster’s lifespan can decrease by as much as 52 in a single week (with 900+ stress and 900+ fatigue).

Drills & Errantry

When you send your monster on a drill or Errantry, while the activity takes 4 weeks, only 2 weeks worth of weekly lifespan decreases (from above) are applied. The 2 decreases are applied based on your monster’s stress and fatigue after coming back from the drill or Errantry.
Because of this, doing a drill or Errantry can be a more effective use of lifespan than normal training.

For example, if you monster returns from a drill with 408 stress and 436 fatigue then its lifespan will be decreased by 28 (-10 + -2 + -2, Twice). This is less than the decrease of 40 (10 per week) that could occur if resting or training for 4 weeks.

Tournaments

Having your monster participate in a tournament reduces its lifespan.

Tournament Lifespan Hit

Result	Value
Win	-8
Lose	-24

Your monster’s stress and fatigue do not have any impact on how much lifespan they lose due to participating in tournaments.

Items

There are several consumable items that impact your monster’s lifespan. They are grouped into the following categories:

• Items that decrease lifespan as a trade-off for temporary battle stat or training effectiveness increases
• Items that increase lifespan as a main or secondary effect

There are two rare items that increase your monster’s lifespan: Silver Peach and Gold Peach. There is no limit to how many peaches a monster can eat. Lifespan only maxes out at 9999, so increasing your monsters lifespan can have it exceed it’s starting lifespan.

Feeding your monster tofu every month can result in your monster living roughly 12% longer.
^{Assuming you raise a monster such that their lifespan decreases by 44 each month. If the monster has a starting lifespan of 1500 (ex. Joker) then tofu will increase their lifespan by ~11.4% (2y 11m -> 3y 3m). If the monster has a starting lifespan of 2500 (ex. Hengar) then tofu will increase their lifespan by ~12.3% (4y 9m -> 5y 4m).}

Each monster species starts out with a particular lifespan when it is created. Their starting lifespan will vary based on their main-breed and sub-breed.

The pattern for the lifespan of a given breed depending on its sub-breed appears to be the following:

Lifespan Calcs

Type	Lifespan Adjustment
Mixed Breed	60/40 of Main/Sub
Breed-"Ish"	105% of Pure-Breed
Special "?"	90% of Pure-Breed

<sup>- Round Down for %
- Special cases below</sup>

Pure-Breed Lifespans

The starting Lifespan can be estimated by: Lifespan Value / 10 / 48.

Staring Lifespan Values

Breed	Lifespan Value
Joker	1500
Pheonix	1500
Gali	1700
Naga	1750
Monol	1800
Dragon	1850
Zan	1850
Falco	1900
Pixie	1900
Centaur	1950
Ducken	1950
Suezo	1950
Tiger	1950
Color Pandora	2000
Hare	2000
Mew	2000
Mocchi	2000
Plant	2000
Abyss	2050
Beaclon	2050
Ogyo	2050
Baku	2100
Durahan	2100
Pancho	2150
Piroro	2200
Xenon	2250
Golem	2300
Hengar	2500
Lesione	2500

Lifespan Exceptions

Special Cases

Breed	Lifespan Value
Geemo	2520
XBakuBaku	2100
XPalco	2280
Woodie	1850

Example Lifespan Calculations

• Falco Pure Breed has 1900 Lifespan Value
• Abyss Pure Breed has 2050 Lifespan Value
• Naguaco (Falco/Abyss) has a lifespan of (0.6 * 1900) + (0.4 * 2050) = 1140 + 820 = 1960
• Falco / ? (-ish) has a lifespan of 1900 * 1.05 = 1995
• Falco / ? (Jock) has a lifespan of 1900 * 0.90 = 1710