Monster Rancher 4 Lifespans, Life Stages, and Growths

 

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Growth Periods

Each monster goes through 4 stages of growth/aging until they are forced to retired a few months afterwards. It is important to take note of this so you know how to manage your monster statgains when they begin to peak, and knowing when to prioritize or prepare for freezing/combining when they're getting old. The four stages can be identified when Rio starts the week by talking about your monster:

Growth Period	Rio says...
1st Growth/Adolescent	The way we raise 'Monster'...
2nd Growth/Mature	'Monster' is Mature...
3rd Growth/Late-age	'Monster' is pretty Old...
4th Growth/Old	'Monster' is becoming pretty weak...
Lifespan Ends/Retirement	'Monster' cannot control body...

Here's a table for each Purebred monster's lifespan for each period. To calculate a sub-breed's lifespan, the lifespan formula is Main + Main + Sub = #, then #/3. This should be number of weeks and works at every stage.

Monster	1st Growth	2nd Growth	3rd Growth	4th Growth	Retirement	Total Weeks
Antlan	10Mo. 3Wk.	2Yr. 0Mo. 3Wk.	3Yr. 2Mo. 2Wk.	4Yr. 0 Mo. 4Wk.	4Yr. 4Mo. 1Wk.	208
Ape	10Mo 4Wk.	2Yr. 0Mo. 4Wk.	3Yr. 2Mo. 4Wk.	4Yr. 1Mo. 2Wk.	4Yr. 4Mo. 3Wk.	210
Baku	11Mo. 2Wk.	2Yr. 1Mo. 4Wk.	3Yr. 4Mo. 3Wk.	4Yr. 3Mo. 3Wk.	4Yr. 7Mo. 1Wk.	220
Beaklon	11Mo. 1Wk.	2Yr. 1Mo. 2Wk.	3Yr. 3Mo. 4Wk.	4Yr. 2Mo. 3Wk.	4Yr. 6Mo. 1Wk.	216
Dragon	10Mo. 1Wk.	1Yr. 11Mo. 1Wk.	3Yr. 0Mo. 1Wk.	3Yr. 9Mo. 4Wk.	4Yr. 1Mo. 1Wk.	196
Ducken	10Mo. 3Wk.	2Yr. 0Mo. 2Wk.	3Yr. 3Mo. 4Wk.	4Yr. 0Mo. 3Wk.	4Yr. 4Mo. 1Wk.	207.2 [208]
Durahan	11Mo. 1Wk.	2Yr. 1Mo. 2Wk.	3Yr. 3Mo. 4Wk.	4Yr. 2Mo. 3Wk.	4Yr. 6Mo. 1Wk.	216
Garu	10Mo. 3Wk.	2Yr. 0Mo. 3Wk.	3Yr. 2Mo. 3Wk.	4Yr. 1Mo. 1Wk.	4Yr. 4Mo. 3Wk.	209.6 [210]
Gitan	10Mo. 1Wk.	1Yr. 11Mo. 1Wk.	3Yr. 0Mo. 1Wk.	3Yr. 9Mo. 4Wk.	4Yr. 1Mo. 1Wk.	196
Golem	11Mo. 2Wk.	2Yr. 2Mo. 2Wk.	3Yr. 5Mo. 2Wk.	4Yr. 4Mo. 3Wk.	4Yr. 8Mo. 1Wk.	224
Hare	10Mo. 3Wk.	2Yr. 0Mo. 3Wk.	3Yr. 2Mo. 2Wk.	4Yr. 0Mo. 4Wk.	4Yr. 4Mo. 1Wk.	208
Henger	10Mo. 2Wk.	2Yr. 0Mo. 3Wk.	3Yr. 2Mo. 2Wk.	4Yr. 0Mo. 4Wk.	4Yr. 4Mo. 1Wk.	208
Jell	10Mo. 2Wk.	2Yr. 0Mo. 1Wk.	3Yr. 1Mo. 4Wk.	3Yr. 11Mo. 4Wk.	4Yr. 3Mo. 1Wk.	204
Joker	8Mo. 1Wk.	1Yr. 6Mo. 3Wk.	2Yr. 5Mo. 2Wk.	3Yr. 1Mo. 2Wk.	3Yr. 4Mo. 1Wk.	158.4 [159]
Koropendora	10Mo. 4Wk.	2Yr. 0Mo. 4Wk.	3Yr. 3Mo. 1Wk.	4Yr. 1Mo. 3Wk.	4Yr. 5Mo. 1Wk.	212
Lesione	10Mo. 4Wk.	2Yr. 0Mo. 4Wk.	3Yr. 3Mo. 1Wk.	4Yr. 1Mo. 3Wk.	4Yr. 5Mo. 1Wk.	211.2 [212]
Madillo	10Mo. 2Wk.	1Yr. 11Mo. 3Wk.	3Yr. 0Mo. 4Wk.	3Yr. 10Mo. 4Wk.	4Yr. 2Mo. 1Wk.	200
Mew	11Mo. 1Wk.	2Yr. 1Mo. 2Wk.	3Yr. 3Mo. 4Wk.	4Yr. 2Mo. 3Wk.	4Yr. 6Mo. 1Wk.	216
Mocchi	10Mo. 3Wk.	2Yr. 0Mo. 3Wk.	3Yr. 2Mo. 3Wk.	4Yr. 1Mo. 1Wk.	4Yr. 4Mo. 3Wk.	209.6 [210]
Mogi	10Mo. 2Wk.	1Yr. 11Mo. 4Wk.	3Yr. 1Mo. 1Wk.	3Yr. 11Mo. 2Wk.	4Yr. 2Mo. 3Wk.	201.6 [202]
Naga	10Mo. 1Wk.	1Yr. 11Mo. 2Wk.	3Yr. 0Mo. 4Wk.	3Yr. 10Mo. 3Wk.	4Yr. 2Mo. 1Wk.	199.2 [200]
Ogyo	10Mo. 4Wk.	2Yr. 1Mo. 1Wk.	3Yr. 3Mo. 2Wk.	4Yr. 2Mo. 1Wk.	4Yr. 5Mo. 3Wk.	213.6 [214]
Pancho	11Mo. 2Wk.	2Yr. 1Mo. 4Wk.	3Yr. 4Mo. 3Wk.	4Yr. 3Mo. 3Wk.	4Yr. 7Mo. 1Wk.	220
Phoenix	8Mo. 1Wk.	1Yr. 6Mo. 3Wk.	2Yr. 5Mo. 2Wk.	3Yr. 1Mo. 2Wk.	3Yr. 4Mo. 1Wk.	160
Pixie	10Mo. 1Wk.	1Yr. 11Mo. 2Wk.	3Yr. 0Mo. 3Wk.	3Yr. 10Mo. 3Wk.	4Yr. 2Mo. 1Wk.	200
Plant	11Mo. 1Wk.	2Yr. 1Mo. 2Wk.	3Yr. 3Mo. 4Wk.	4Yr. 2Mo. 3Wk.	4Yr. 6Mo. 1Wk.	216
Raiden	10Mo. 4Wk.	2Yr. 0Mo. 4Wk.	3Yr. 3Mo. 1Wk.	4Yr. 1Mo. 3Wk.	4Yr. 5Mo. 1Wk.	212
Rhinoroller	10Mo. 3Wk.	2Yr. 0Mo. 3Wk.	3Yr. 2Mo. 3Wk.	4Yr. 1Mo. 1Wk.	4Yr. 4Mo. 3Wk.	209.6 [210]
Ripper	10Mo. 1Wk.	1Yr. 11Mo. 1Wk.	3Yr. 0Mo. 1Wk.	3Yr. 9Mo. 4Wk.	4Yr. 1Mo. 1Wk.	196
Suezo	10Mo. 3Wk.	2Yr. 0Mo. 2Wk.	3Yr. 2Mo. 1Wk.	4Yr. 0Mo. 2Wk.	4Yr. 3Mo. 4Wk.	206.4 [207]
Suzurin	10Mo. 4Wk.	2Yr. 1Mo. 2Wk.	3Yr. 3Mo. 3Wk.	4Yr. 2Mo. 2Wk.	4Yr. 5Mo. 4Wk.	214.4 [215]
Tiger	10Mo. 2Wk.	1Yr. 11Mo. 4Wk.	3Yr. 1Mo. 1Wk.	3Yr. 11Mo. 2Wk.	4Yr. 2Mo. 3Wk.	201.6 [202]
Zan	10Mo. 1Wk.	1Yr. 11Mo. 1Wk.	3Yr. 0Mo. 1Wk.	3Yr. 9Mo. 4Wk.	4Yr. 1Mo. 1Wk.	196
Zuum	10Mo. 4Wk.	2Yr. 0Mo. 4Wk.	3Yr. 3Mo. 1Wk.	4Yr. 1Mo. 3Wk.	4Yr. 5Mo. 1Wk.	212

 

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Life Types

Each unique monster also has a moment in which they gain an incredible amount of stats or 'peak' during training. There are 6 different growth types: Premature Weak, Premature Strong, Normal, Consistent, Late-bloomer Weak, and Late-bloomer Strong.

Life Types by Main Breed (See Monster Data to view sub-breed variations in Life Type)

Life Types	Monsters
Premature Weak	Pixie, Ripper
Premature Strong	Mogi, Naga, Plant, Rhinoroller, Suezo, Tiger
Normal	Dragon, Garu, Hare, Jell, Mocchi, Ogyo, Suzurin, Zan, Zuum
Consistent	Ducken, Durahan, Henger, Joker, Madillo, Mew
Late-bloomer Weak	Antlan, Beaklon, Gitan, Koropendora, Pancho, Raiden
Late-bloomer Strong	Baku, Golem, Lesione

 

Heatmap guide to life types. Darkest green indicates the best gains.

Expand explanations of the Heat Map:

Monster Type Food/Item Interests

Every monster one category of food and items they will "Really Like", "Like", "Dislike", "Really Dislike", and "Hate". The table below shows how it affects them when you feed/give them one that fits the category. Food and Items NEVER raises stress! There's a bug in the game when your monster's hunger status over-prioritizes stress. Once hunger has been lowered, the game will show if it is currently stressed.

If the monster is a sub-breed of another type, it will use that sub-breed monster type for its Likes/Dislikes. If the monster is a rare/special breed, then it will usually have its own distinct set of Likes/Dislikes. If the monster is a rare/special breed, then it will usually have its own distinct set of Likes/Dislikes.
Example: Datonare (Tiger/Zuum) will not use Tiger's Interests, but instead use Zuum's Interests.

This can be very helpful if trying to maintain normal policy as often as possible! It may seem a little cruel, but your monster will have a much easier raising style in the middle

Food Interests

	Really Like	Like	Dislike	Really Dislike	Hate
Fullness Multiplier	1.25x	1.125x	0.875x	0.75x	0 (Refuses Food!)
Policy Change	2	1	-2	-4	0 (Refuses Food!)

Gift Item

	Really Like	Like	Dislike	Really Dislike	Hate
Policy Change	2	1	-2	-4	0 (Refuses Gift!)