Site News
Warning: This wiki contains spoilers. Read at your own risk!

Discord: If you would like, please join our Discord server!

Biorhythm

From Fire Emblem Wiki, your source on Fire Emblem information. By fans, for fans.
Nolan's biorhythm (bottom right) moves as turns pass. As his biorhythm changes from good to bad, it has effects on his hit rate and avoid (top right). Additionally, green and red arrows (top left) indicate his current biorhythm state.

Biorhythm (Japanese: バイオリズム biorhythm) is a mechanic applied to units which simulates how an individual's ability to fight to their fullest potential fluctuates as time goes on, making them perform better at some times and perform worse at others. A unit's biorhythm follows a pattern shaped like a sine wave, advancing along the wave a little bit periodically, and as it follows the ups and downs of this wave, the biorhythm give bonuses or penalties to the unit's accuracy and evasive ability during the course of a battle.

At any given time, a unit's biorhythm puts them in one of five states: Best, Good, Normal, Bad, and Worst. A Good state or higher gives the unit small hit and avoid boosts, while a Bad state or lower gives small penalties to the same. The biorhythm chart can be viewed in each unit's stat screen to see their current state and where the biorhythm will put them in later turns, and their current biorhythm state is shown on the map when hovering the cursor over them, indicated by red and green arrows.

Biorhythm is only present in Fire Emblem: Path of Radiance and Radiant Dawn.

Fire Emblem: Path of Radiance

Biorhythm pattern

Biorhythm
Best
Good
Normal
Bad
Worst

In Fire Emblem: Path of Radiance, all units share the same biorhythm wave. Biorhythm moves in a 30-point cycle, after which it restarts from the beginning of the wave.

Biorhythm moves under two conditions:

  • For every 10 rounds of attack the unit participates in (regardless of whether they initiate it or are capable of counter-attacking), their biorhythm moves forward by one point.
  • For every chapter they participate in that gets cleared, their biorhythm moves forward by seven points. The four parts of Chapter 17 are not treated as individual chapters for the purposes of biorhythm advancement, but the Black Knight part of Chapter 27 is treated as a separate chapter.

Almost all units, both playable and enemy, will start a map with their biorhythm at a completely random point, with the point being reset every time the player resets the game. However, several early-game units (10 playable, 2 bosses) will have their biorhythm start at a pre-set point when they first appear in their debut chapter.

  • Ike starts the Prologue at biorhythm point 8 (Best)
  • Oscar starts Chapter 1 at biorhythm point 23 (Worst)
  • Titania starts Chapter 1 at biorhythm point 30 (Normal)
  • Mia starts Chapter 7 at biorhythm point 8 (Best)
  • Mist starts Chapter 9 at biorhythm point 11 (Best)
  • Rolf starts Chapter 9 at biorhythm point 11 (Best)
  • Boyd, as an enemy in the Prologue, starts at biorhythm point 8 (Best)
  • Greil, the boss of the Prologue, starts at biorhythm point 8 (Best)
  • Zawana, the boss of Chapter 1, starts at biorhythm point 28 (Bad)

In terms of how this is handled internally, these starting biorhythms are actually counted up from how many chapters have elapsed since the "first chapter" in terms of the game's internal storage, which is actually the debug map, with the Prologue being counted as #2 and the rest of the game's chapters proceeding from there. For instance, Mia's starting biorhythm is actually stored as 12 (Good), but since the player has progressed through eight chapters (counted as including the debug menu) by the time she first appears, the seven points awarded by clearing a chapter are applied eight times, bringing her to start with her biorhythm at 8 (Best).[1]

Calculations

The five biorhythm states award the following bonuses

Skills affecting biorhythm

Skills affecting biorhythm
Item Effect Games
  Tempest Doubles biorhythm effects. Path of Radiance
  Serenity Halves biorhythm effects. Path of Radiance

Fire Emblem: Radiant Dawn

Biorhythm patterns

There are ten different biorhythm waves in Fire Emblem: Radiant Dawn, two of which are exclusive to enemy bosses. Playable units and major enemies are all assigned one specific biorhythm pattern, while generic enemies are assigned biorhythms at random (excluding types 8 and 9). All ten waves move through a 25-point cycle, after which it restarts from the beginning of the wave. Every unit starts a map with their biorhythm set to a random point, and all biorhythms advance by one point per turn.

Type 0

Biorhythm
Best
Good
Normal
Bad
Worst

The type 0 biorhythm is a standard pattern, comparable to the Path of Radiance pattern. It is found on nine playable units, five bosses, and one NPC.

Player  
Nolan
 
Vika
 
Elincia
 
Oscar
 
Ranulf
 
Sigrun
 
Stefan
 
Caineghis
 
Kurthnaga
Bosses and NPCs  
Isaiya
 
Kurth
 
Burton
 
Callum
 
Yuma

Type 1

Biorhythm
Best
Good
Normal
Bad
Worst

The type 1 biorhythm has very long Best and Worst points. It is found on nine playable units, five bosses, and one NPC.

Player  
Micaiah
 
Aran
 
Volug
 
Zihark
 
Brom
 
Makalov
 
Astrid
 
Rhys
 
Tanith
Bosses and NPCs  
Zaitan
 
Djur
 
Istvan
 
Zelgius
 
Roark
 
Black Knight

Type 2

Biorhythm
Best
Good
Normal
Bad
Worst

The type 2 biorhythm has relatively stable and minor effects on units' stats, having neither Best nor Worst points. It is found on nine playable units and three bosses.

Player  
Leonardo
 
Tauroneo
 
Muarim
 
Marcia
 
Nephenee
 
Ulki
 
Naesala
 
Pelleas
 
Nasir
Bosses and NPCs  
Agony
 
Tashoria
 
Levail

Type 3

Biorhythm
Best
Good
Normal
Bad
Worst

The type 3 biorhythm is somewhat erratic, spending relatively little time at Normal, Good, or Bad points. It is found on six playable units, five bosses, and one NPC.

Player  
Heather
 
Kieran
 
Boyd
 
Lyre
 
Skrimir
 
Oliver
Bosses and NPCs  
Aimee
 
Pain
 
Rommit
 
Sergei
 
Valtome
 
Lekain

Type 4

Biorhythm
Best
Good
Normal
Bad
Worst

The type 4 biorhythm is very erratic and rapidly plunges between Best and Worst points. It is found on five playable units and seven bosses.

Player  
Jill
 
Calill
 
Soren
 
Shinon
 
Kyza
Bosses and NPCs  
Pugo
 
Wystan
 
Yeardley
 
Septimus
 
Numida
 
Izuka
 
Hetzel

Type 5

Biorhythm
Best
Good
Normal
Bad
Worst

The type 5 biorhythm is somewhat erratic, spending relatively little time at Normal, Good, or Bad points. It is found on thirteen playable units and three bosses.

Player  
Edward
 
Tormod
 
Nealuchi
 
Lethe
 
Mordecai
 
Geoffrey
 
Titania
 
Mist
 
Mia
 
Gatrie
 
Reyson
 
Janaff
 
Sanaki
Bosses and NPCs  
Zeffren
 
Ludveck
 
Kezhda

Type 6

Biorhythm
Best
Good
Normal
Bad
Worst

The type 6 biorhythm is very stable, having neither Best nor Worst points and spending long periods of time in Good and Bad states. It is found on nine playable units and three bosses.

Player  
Sothe
 
Ilyana
 
Fiona
 
Rafiel
 
Haar
 
Bastian
 
Volke
 
Giffca
 
Ena
 
Lehran
Bosses and NPCs  
Maraj
 
Lombroso
 
Dheginsea
 
Sephiran

Type 7

Biorhythm
Best
Good
Normal
Bad
Worst

The type 7 biorhythm has very long Best and Worst points and sharply shifts between them. It is found on ten playable units and one boss.

Player  
Laura
 
Meg
 
Nailah
 
Lucia
 
Danved
 
Ike
 
Rolf
 
Tibarn
 
Renning
 
Gareth
Bosses and NPCs  
Laverton

Type 8

Biorhythm
Best
Good
Normal
Bad
Worst

The type 8 biorhythm is completely neutral and gives no bonuses or penalties whatseover. It is exclusive to enemy bosses.

Bosses and NPCs  
Radmin
 
Silvano
 
Catalena
 
Ashera

Type 9

Biorhythm
Best
Good
Normal
Bad
Worst

The type 9 biorhythm is similar to type 0, except it never enters Worst points. It is exclusive to enemy bosses.

Bosses and NPCs  
Jarod
 
Veyona
 
Goran

Calculations

The five biorhythm states award the following bonuses

Items and skills affecting biorhythm

Items and skills affecting biorhythm
Item Effect Games
  Matrona A staff that restores all HP to a distant target. It also raises the target's biorhythm to its peak. Radiant Dawn
  Galdrar Bliss: Raise biorhythm to its highest point.
Sorrow: Lower biorhythm to its lowest point.
Radiant Dawn

Trivia

  • Although biorhythm as a mechanic is absent in all games after Radiant Dawn, the Japanese names of the skills Odd Rhythm and Even Rhythm from Awakening refer to it and have similar effects, although their effects work on a much smaller scale.

Etymology and other languages

Names, etymology and in other regions
Language Name Definition, etymology and notes
English

Biorhythm

Combination of "bio-", a common prefix meaning "life", and "rhythm".

Japanese

バイオリズム

Biorhythm; as above.

Spanish

Biorritmo

Biorhythm

French

Rythme biologique

Biological rhythm

German

Biorhythm

Biorhythm

Italian

Biorhythm

Biorhythm

Gallery

References

  1. VincentASM, Biorhythm, Serenes Forest, Retrieved: 2016-06-25
Game mechanics
Out-of-battle management Base (Base conversationMy Castle) • Bonus experienceDungeonsGameplay modes (DifficultyCreature CampaignNew Game +) • GoldLessonsMila ShrinesPreparationsRenownShopping (ArmoryBargainsForgeMerchantOnline shopSecret shopVendor) • Supply convoyWorld map
Battles and chapters ArenaBattle saveBossCastleChapter (Alternate routeParalogueSidequest) • ChestCombat forecastEvent tilesHidden treasureObjectivesReinforcementSkirmishTerrain (Hazards) • TurnWeather (Fog of war)
Stats Units ActionAffinityAuthorityBiorhythmCharmClassClass relative powerConstitution (Aid) • DefenseExperienceFollow-up critical multiplierGrowth rateHit pointHoly BloodInventoryLevelLuckMagicMovementResistanceSkillSpeedStrengthWeapon levelWeight
Weapons Brave weaponCritDurabilityHitKill bonusMightPersonal weaponsRangeWeapon experienceWeapon levelWeightWorth
Unit mechanics and commands AdjutantAttackAuto-BattleBattalion (Gambit) • CantoClass change (Reclass) • Combat artCrestsDance/Play (GaldrarSing) • Death (Decoy) • DismountDragon VeinFatigueInventoryLaguz transformationLove (JealousyInheritance) • Pair UpRecruitmentRescue (Capture) • Skills (Offensive skill) • Staggering BlowStatus conditionsSupportTalkTradeUnit (AvatarBond unitsBonus unitEinherjarLoan unitPrisonerReplacement unitSubstitute character) • Visit
Calculations Attack speedAvoidCritical hit (Combination bonusDodgeTriangle Attack) • Bonus damageHit rate (True hit) • Random number generatorWeapon triangle (Trinity of magic)
Connectivity amiiboDouble DuelDownloadable contentLink ArenaMultiplayer battleOnline shopSpotPassStreetPass
Other BarrierBirthdayGlitchesRankingsSound RoomTacticianMultiple endings