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X Aeons' stats rise naturally with Yuna's, but also with the number of battles the party took part in (including boss battles, and battles the party ran away from).

The formula is the same, but parameters depend on the aeon and on the stat:

$A = \max(x,y)+z$

Where $A$ is the aeon's stat, $x$ is the value of the stat calculated from the number of battles, $y$ is the value of the stat calculated from Yuna's stats, and $z$ is the increase of the stat the player has done using spheres after receiving Aeon's Soul from Belgemine.

### Calculation of parameter x (calculated from number of battles)Edit

All battles, including those against bosses, those the party runs from, even those before Yuna joins the party, counted in the number of battles $N$.

Note: Values of his table are extracted from Final Fantasy X Ultimania Guide.

Number of battles N Valefor's Max HP (referential) Approximate damage that would cause the Aeon to perform his Overdrive respect Valefor's Max HP
Valefor Ifrit Ixion Shiva Bahamut
0 to 59 725 1401~ 1582 1083~ 1223 984~ 1111 1440~ 1627 894~ 1009
60 to 89 785 2029~ 2291 1393~ 1573 1440~ 1627 2266~ 2559 1181~ 1333
90 to 119 885 2834~ 3200 1966~ 2220 2035~ 2298 3068~ 3464 1729~ 1953
120 to 149 955 2834~ 3200 1966~ 2220 2035~ 2298 3068~ 3464 1729~ 1953
150 to 179 1003 3836~ 4331 2966~ 3349 2784~ 3144 4052~ 4576 2442~ 2757
180 to 209 1127 4218~ 4763 2966~ 3349 3068~ 3464 4422~ 4993 2442~ 2757
210 to 239 1169 5527~ 6241 3581~ 4043 3705~ 4183 5667~ 6399 3020~ 3410
240 to 269 1229 7664~ 8654 5477~ 6185 5231~ 5906 8243~ 9308 4446~ 5020
270 to 299 1341 10305~11636 7418~ 8376 7136~ 8058 10796~12190 6277~ 7088
300 to 329 1465 10305~11636 7418~ 8376 7674~ 8665 10796~12190 6277~ 7088
330 to 359 1525 13495~15238 9777~11040 9464~10686 14677~16573 7943~ 8969
360 to 389 1573 14386~16245 9777~11040 9464~10686 14677~16573 7943~ 8969
390 to 419 1685 18346~20716 12594~14221 12255~13837 19398~21904 10605~11975
420 to 449 1785 18346~20716 13376~15104 13028~14711 19398~21904 10605~11975
450 to 479 1845 22978~25946 15911~17966 15553~17562 23835~26914 12955~14628
480 to 509 1917 22978~25946 15911~17966 15553~17562 25041~28276 13812~15596
510 to 539 2005 28335~31995 20821~23511 19398~21904 30276~34187 17612~19887
540 to 569 2053 28335~31995 20821~23511 20449~23091 30276~34187 17612~19887
570 to 599 2177 36131~40798 25410~28692 25041~28276 37785~42666 22059~24908
600 and more 2225 36131~40798 25410~28692 25041~28276 37785~42666 22059~24908

Depending on $N$, the aeon, and the stat being examined, the parameter $x$ will be different. Below are tables giving the value of this parameter for each aeon.

Note: Values of each aeon's table are extracted from Final Fantasy X Ultimania Guide.

#### ValeforEdit

Number of battles N Max HP Max MP Strength Defense Magic Magic Defense Agility Evasion Accuracy
0 to 59 725 24 18 23 21 23 10 19 11
60 to 89 785 27 19 25 24 26 10 20 11
90 to 119 885 29 20 28 27 27 12 21 12
120 to 149 955 30 21 29 27 30 12 21 12
150 to 179 1003 31 22 30 30 33 12 21 12
180 to 209 1127 35 24 33 31 37 15 24 13
210 to 239 1169 36 25 34 34 41 15 24 13
240 to 269 1229 39 27 36 38 41 18 25 14
270 to 299 1341 43 28 39 42 42 19 27 15
300 to 329 1465 46 30 44 42 46 21 28 15
330 to 359 1525 49 32 46 46 46 22 30 16
360 to 389 1573 50 33 47 47 51 24 30 16
390 to 419 1685 53 35 50 51 55 25 31 17
420 to 449 1785 55 36 52 51 55 27 33 17
450 to 479 1845 58 38 54 55 60 28 34 18
480 to 509 1917 60 39 58 55 60 30 36 18
510 to 539 2005 63 40 60 59 60 31 37 19
540 to 569 2053 64 42 61 59 65 31 39 19
570 to 599 2177 69 44 64 64 65 34 39 20
600 and more 2225 71 45 66 64 69 34 42 20

#### IfritEdit

Number of battles N Max HP Max MP Strength Defense Magic Magic Defense Agility Evasion Accuracy
0 to 59 857 23 19 29 21 21 9 10 11
60 to 89 907 26 20 31 23 23 9 10 11
90 to 119 1097 28 21 36 26 23 11 10 12
120 to 149 1262 29 22 37 26 26 11 10 12
150 to 179 1302 30 23 38 30 30 11 10 12
180 to 209 1512 34 25 41 30 32 13 12 13
210 to 239 1547 35 26 42 32 36 13 12 13
240 to 269 1597 37 28 44 37 36 16 12 14
270 to 299 1797 41 29 47 41 37 17 14 15
300 to 329 2007 44 31 57 41 41 18 14 15
330 to 359 2057 47 33 59 45 42 19 15 16
360 to 389 2097 48 34 60 45 45 21 16 16
390 to 419 2297 51 36 63 49 49 22 16 17
420 to 449 2487 53 37 65 50 49 23 17 17
450 to 479 2537 56 39 67 53 53 24 17 18
480 to 509 2597 58 40 76 53 53 26 18 18
510 to 539 2777 60 41 78 58 53 27 18 19
540 to 569 2817 61 43 79 58 58 27 19 19
570 to 599 3027 66 45 82 62 58 30 20 20
600 and more 3067 68 46 84 62 62 30 22 20

#### IxionEdit

Number of battles N Max HP Max MP Strength Defense Magic Magic Defense Agility Evasion Accuracy
0 to 59 891 25 20 26 20 29 8 11 12
60 to 89 951 28 21 28 23 32 8 11 12
90 to 119 1121 30 22 32 26 33 9 11 13
120 to 149 1261 31 23 33 26 37 9 11 13
150 to 179 1309 33 24 34 29 41 9 11 13
180 to 209 1503 37 26 37 30 46 11 13 14
210 to 239 1545 38 27 38 32 51 11 13 14
240 to 269 1605 41 29 40 36 51 14 13 15
270 to 299 1787 45 30 43 40 52 15 15 16
300 to 329 1981 48 32 50 41 58 16 16 16
330 to 359 2041 51 34 52 44 58 17 17 17
360 to 389 2089 52 35 53 44 64 18 17 17
390 to 419 2271 56 37 56 48 69 19 17 18
420 to 449 2441 58 38 58 49 69 20 19 18
450 to 479 2501 61 40 60 52 75 21 19 19
480 to 509 2573 63 41 66 52 75 22 20 19
510 to 539 2731 66 42 68 56 75 23 20 20
540 to 569 2779 67 44 69 57 81 23 21 20
570 to 599 2973 72 46 72 61 81 26 22 21
600 and more 3021 74 47 74 61 87 26 24 21

#### ShivaEdit

Number of battles N Max HP Max MP Strength Defense Magic Magic Defense Agility Evasion Accuracy
0 to 59 820 26 19 17 23 24 14 32 11
60 to 89 880 30 20 18 27 27 15 34 11
90 to 119 1020 32 21 19 30 28 18 34 12
120 to 149 1130 33 22 20 30 31 18 34 12
150 to 179 1178 35 23 21 33 34 19 35 12
180 to 209 1342 40 25 23 34 38 22 39 13
210 to 239 1384 41 25 24 37 42 22 39 13
240 to 269 1444 44 27 26 42 42 27 39 14
270 to 299 1596 48 28 27 46 43 27 44 15
300 to 329 1760 51 30 31 46 47 32 44 15
330 to 359 1820 55 31 33 51 48 32 48 16
360 to 389 1868 56 32 34 51 52 37 48 16
390 to 419 2020 60 34 36 56 57 37 49 17
420 to 449 2160 62 35 37 56 57 42 53 17
450 to 479 2220 66 36 39 60 61 42 53 18
480 to 509 2292 68 38 42 61 62 47 57 18
510 to 539 2420 71 39 43 65 62 47 58 19
540 to 569 2468 72 40 45 65 66 47 62 19
570 to 599 2632 78 41 47 70 67 52 62 20
600 and more 2680 80 42 48 70 71 52 66 20

#### BahamutEdit

Number of battles N Max HP Max MP Strength Defense Magic Magic Defense Agility Evasion Accuracy
0 to 59 1210 35 23 27 18 28 10 20 11
60 to 89 1280 39 24 29 20 32 10 21 11
90 to 119 1550 42 25 34 23 33 12 22 12
120 to 149 1785 44 26 35 23 36 12 22 12
150 to 179 1841 47 27 37 26 40 12 22 12
180 to 209 2139 52 29 39 26 44 15 25 13
210 to 239 2188 54 30 40 28 49 15 25 13
240 to 269 2258 58 32 42 32 50 18 26 14
270 to 299 2542 63 33 44 36 51 19 29 15
300 to 329 2840 67 35 54 36 56 21 29 15
330 to 359 2910 71 37 56 39 57 22 32 16
360 to 389 2966 73 38 57 39 61 24 32 16
390 to 419 3250 78 40 59 43 66 25 33 17
420 to 449 3520 81 41 61 43 67 27 35 17
450 to 479 3590 85 43 62 46 72 28 36 18
480 to 509 3674 89 44 72 47 73 30 38 18
510 to 539 3930 92 45 74 51 74 31 39 19
540 to 569 3986 94 47 75 51 78 31 41 19
570 to 599 4284 101 49 77 55 79 34 42 20
600 and more 4340 103 50 79 55 84 34 44 20

#### AnimaEdit

Number of battles N Max HP Max MP Strength Defense Magic Magic Defense Agility Evasion Accuracy
0 to 59 1410 45 33 26 22 23 9 20 11
60 to 89 1490 50 35 28 25 26 9 21 11
90 to 119 1810 54 36 32 28 27 11 22 12
120 to 149 2090 56 37 33 28 30 11 22 12
150 to 179 2154 59 39 34 31 33 11 22 12
180 to 209 2506 65 41 37 32 37 13 25 13
210 to 239 2562 68 42 38 35 41 13 25 13
240 to 269 2642 73 44 40 39 41 16 26 14
270 to 299 2978 79 46 43 43 42 17 29 15
300 to 329 3330 85 48 50 44 46 18 29 15
330 to 359 3410 90 50 52 47 46 19 32 16
360 to 389 3474 93 51 53 47 51 21 32 16
390 to 419 3810 98 53 56 51 55 22 33 17
420 to 449 4130 102 55 58 52 55 23 35 17
450 to 479 4210 107 56 60 56 60 24 36 18
480 to 509 4306 111 58 66 57 60 26 38 18
510 to 539 4610 116 60 68 61 60 27 39 19
540 to 569 4674 119 61 69 61 65 27 41 19
570 to 599 5026 126 63 72 65 65 30 42 20
600 and more 5090 130 65 74 66 69 30 44 20

#### YojimboEdit

Number of battles N Max HP Max MP Strength Defense Magic Magic Defense Agility Evasion Accuracy
0 to 59 1030 0 29 25 16 23 9 59 19
60 to 89 1120 0 31 26 18 26 9 62 20
90 to 119 1246 0 32 32 20 27 11 63 21
120 to 149 1327 0 33 33 20 30 11 63 22
150 to 179 1399 0 35 34 23 33 11 63 22
180 to 209 1561 0 37 36 23 37 13 71 24
210 to 239 1624 0 38 36 25 41 13 71 24
240 to 269 1714 0 40 38 28 41 16 72 25
270 to 299 1858 0 42 39 31 42 17 81 27
300 to 329 2020 0 44 51 32 46 18 81 28
330 to 359 2110 0 46 52 34 46 19 89 29
360 to 389 2182 0 47 53 35 51 21 89 30
390 to 419 2326 0 49 55 37 55 22 90 31
420 to 449 2452 0 51 56 38 55 23 97 32
450 to 479 2542 0 52 57 41 60 24 98 33
480 to 509 2650 0 54 69 42 60 26 105 34
510 to 539 2758 0 56 70 44 60 27 106 35
540 to 569 2830 0 57 71 44 65 27 113 36
570 to 599 2992 0 59 72 48 65 30 114 37
600 and more 3064 0 61 73 48 69 30 122 38

#### Cindy (Magus Sister)Edit

Number of battles N Max HP Max MP Strength Defense Magic Magic Defense Agility Evasion Accuracy
0 to 59 2190 46 28 32 21 28 10 20 11
60 to 89 2290 52 30 34 24 32 10 21 11
90 to 119 2870 55 31 41 28 33 12 22 12
120 to 149 3400 57 32 42 28 36 12 22 12
150 to 179 3480 63 34 44 31 40 12 22 12
180 to 209 4100 70 36 46 31 44 15 25 13
210 to 239 4170 72 37 47 34 49 15 25 13
240 to 269 4270 79 39 49 38 50 18 26 14
270 to 299 4870 87 41 51 43 51 19 29 15
300 to 329 5490 91 43 65 43 56 21 29 15
330 to 359 5590 97 45 67 47 57 22 32 16
360 to 389 5670 99 46 68 47 61 24 32 16
390 to 419 6270 107 48 70 51 66 25 33 17
420 to 449 6850 110 50 72 51 67 27 35 17
450 to 479 6950 116 51 73 56 72 28 36 18
480 to 509 7070 120 53 87 56 73 30 38 18
510 to 539 7630 126 55 89 60 74 31 39 19
540 to 569 7710 128 56 90 60 78 31 41 19
570 to 599 8330 140 58 92 64 79 34 42 20
600 and more 8410 142 60 94 64 84 34 44 20

#### Sandy (Magus Sister)Edit

Number of battles N Max HP Max MP Strength Defense Magic Magic Defense Agility Evasion Accuracy
0 to 59 1790 35 42 26 24 28 10 17 13
60 to 89 1870 39 43 28 27 32 10 17 13
90 to 119 2350 42 44 32 31 33 12 18 14
120 to 149 2790 44 45 33 31 36 12 18 14
150 to 179 2854 47 46 35 34 40 12 18 14
180 to 209 3366 52 48 37 34 44 15 21 15
210 to 239 3422 54 49 38 38 49 15 21 15
240 to 269 3502 58 51 40 43 50 18 22 16
270 to 299 3998 63 52 42 48 51 19 25 17
300 to 329 4510 67 54 51 48 56 21 25 17
330 to 359 4590 71 56 53 53 57 22 27 18
360 to 389 4654 73 57 54 53 61 24 27 18
390 to 419 5150 78 59 56 57 66 25 28 19
420 to 449 5630 81 60 58 57 67 27 30 19
450 to 479 5710 85 62 59 63 72 28 31 20
480 to 509 5806 89 63 69 63 73 30 32 20
510 to 539 6270 92 64 71 67 74 31 33 21
540 to 569 6334 94 66 72 67 78 31 35 21
570 to 599 6846 101 68 74 73 79 34 36 22
600 and more 6910 103 69 76 73 84 34 38 22

#### Mindy (Magus Sister)Edit

Number of battles N Max HP Max MP Strength Defense Magic Magic Defense Agility Evasion Accuracy
0 to 59 1237 58 23 24 28 28 12 23 12
60 to 89 1287 66 24 26 31 32 12 24 12
90 to 119 1637 70 25 29 36 33 15 25 13
120 to 149 1962 72 26 30 36 36 15 25 13
150 to 179 2002 79 27 32 40 40 15 25 13
180 to 209 2372 88 29 34 40 44 18 28 14
210 to 239 2407 91 30 35 44 49 18 28 14
240 to 269 2457 99 32 37 50 50 22 29 15
270 to 299 2817 108 33 39 56 51 23 33 16
300 to 329 3187 114 35 47 56 56 25 33 16
330 to 359 3237 122 37 49 62 57 26 36 17
360 to 389 3277 125 38 50 62 61 29 36 17
390 to 419 3637 134 40 52 67 66 30 37 18
420 to 449 3987 138 41 54 67 67 33 39 18
450 to 479 4037 146 43 55 73 72 34 40 19
480 to 509 4097 150 44 63 73 73 37 43 19
510 to 539 4437 158 45 65 78 74 38 44 20
540 to 569 4477 161 47 66 78 78 38 46 20
570 to 599 4847 174 49 68 85 79 42 47 21
600 and more 4887 178 50 70 85 84 42 50 21

### Calculation of parameter y (calculated from Yuna's stats)Edit

The most important parameter used in those formulas depends on Yuna's general stats. Let us call it $Y$. It depends on all of Yuna's stats—except Luck—that is, Yuna's max HP $Y_{\text{max HP}}$ (can't exceed 9999), Yuna's max MP $Y_{\text{max MP}}$ (can't exceed 999), Yuna's strength $Y_{\text{str}}$, Yuna's defense $Y_{\text{def}}$, Yuna's magic $Y_{\text{mag}}$, Yuna's magic defense $Y_{\text{mdf}}$, Yuna's agility $Y_{\text{agi}}$, Yuna's evasion $Y_{\text{eva}}$ and Yuna's accuracy $Y_{\text{acc}}$.

$Y = \lfloor\frac{Y_{\text{max HP}}}{100}\rfloor+\lfloor\frac{Y_{\text{max MP}}}{10}\rfloor+Y_{\text{str}}+Y_{\text{def}}+Y_{\text{mag}}+Y_{\text{mdf}}+Y_{\text{agi}}+Y_{\text{eva}}+Y_{\text{acc}}$

#### Max HPEdit

The formula is:

$y=a\times Y + b\times Y_{\text{max HP}}$ (floored)

Where $Y_{\text{max HP}}$ can't exceed 9999, and $a$ and $b$ values depend on the aeon following the table below:

Aeon a b
Valefor 6 0.2
Ifrit 5 0.7
Ixion 6 0.55
Shiva 6 0.4
Bahamut 8 1.2
Anima 9 0.18
Yojimbo 7 1
Cindy (Magus Sister) 10 2.4
Sandy (Magus Sister) 8 2
Mindy (Magus Sister) 5 1.5

#### Max MPEdit

The formula is:

$y=a\times Y + b\times Y_{\text{max MP}}$ (floored)

Where $Y_{\text{max MP}}$ can't exceed 999, and $a$ and $b$ values depend on the aeon following the table below:

Aeon a b
Valefor 0.2 0.04
Ifrit 0.2 0.03
Ixion 0.2 0.05
Shiva 0.2 0.07
Bahamut 0.3 0.05
Anima 0.4 0.04
Yojimbo 0 0
Cindy (Magus Sister) 0.3 0.18
Sandy (Magus Sister) 0.3 0.05
Mindy (Magus Sister) 0.4 0.2

#### StrengthEdit

Aeon's strength, like other stats cannot exceed 255.

The formula is:

$y=\frac Y a+ b\times Y_{\text{str}}$ (floored)

Where $a$ and $b$ values depend on the aeon following the table below:

Aeon a b
Valefor 7 0.6
Ifrit 7 0.8
Ixion 7 1
Shiva 8 1.2
Bahamut 7 1.6
Anima 6 3.3
Yojimbo 6 2.4
Cindy (Magus Sister) 6 2.3
Sandy (Magus Sister) 7 5.5
Mindy (Magus Sister) 7 1.6

#### DefenseEdit

Aeon's defense, like other stats cannot exceed 255.

The formula is:

$y=\frac Y a+ b\times Y_{\text{def}}$ (floored)

Where $a$ and $b$ values depend on the aeon following the table below:

Aeon a b
Valefor 5 0.5
Ifrit 5 1.7
Ixion 5 1
Shiva 7 0.4
Bahamut 6 2
Anima 5 1
Yojimbo 8 2.5
Cindy (Magus Sister) 6 3
Sandy (Magus Sister) 6 1.8
Mindy (Magus Sister) 6 1.4

#### MagicEdit

Aeon's magic, like other stats cannot exceed 255.

Formula is:

$y=\frac Y a+ b\times Y_{\text{mag}}$ (floored)

Where $a$ and $b$ values depend on the aeon following the table below:

Aeon a b
Valefor 70 1
Ifrit 33 0.9
Ixion 38 0.9
Shiva 28 1
Bahamut 250 0.9
Anima 12 0.7
Yojimbo 23 0.6
Cindy (Magus Sister) 60 1
Sandy (Magus Sister) 40 1.1
Mindy (Magus Sister) 40 1.3

#### Magic DefenseEdit

Aeon's magic defense, like other stats cannot exceed 255.

The formula is:

$y=\frac Y a+ b\times Y_{\text{mdf}}$ (floored)

Where $a$ and $b$ values depend on the aeon following the table below:

Aeon a b
Valefor 30 1
Ifrit 34 0.9
Ixion 30 1.3
Shiva 25 1
Bahamut 12 1
Anima 30 1
Yojimbo 30 1
Cindy (Magus Sister) 12 1
Sandy (Magus Sister) 12 1
Mindy (Magus Sister) 12 1

#### AgilityEdit

Aeon's agility, like other stats cannot exceed 255.

The formula is:

$y=\frac Y a+ b\times Y_{\text{agi}}$ (floored)

Where $a$ and $b$ values depend on the aeon following the table below:

Aeon a b
Valefor 20 0.5
Ifrit 20 0.4
Ixion 20 0.3
Shiva 23 1
Bahamut 20 0.5
Anima 20 0.4
Yojimbo 20 0.4
Cindy (Magus Sister) 20 0.5
Sandy (Magus Sister) 20 0.5
Mindy (Magus Sister) 20 0.7

#### EvasionEdit

Aeon's evasion, like other stats cannot exceed 255.

The formula is:

$y=\frac Y a+ b\times Y_{\text{eva}}$ (floored)

Where $a$ and $b$ values depend on the aeon following the table below:

Aeon a b
Valefor 24 0.5
Ifrit 70 0.3
Ixion 47 0.3
Shiva 44 1
Bahamut 20 0.5
Anima 20 0.5
Yojimbo 20 1.8
Cindy (Magus Sister) 20 0.5
Sandy (Magus Sister) 20 0.4
Mindy (Magus Sister) 20 0.6

#### AccuracyEdit

Aeon's accuracy, like other stats cannot exceed 255.

The formula is:

$y=\frac Y a+ b\times Y_{\text{acc}}$ (floored)

Where $a$ and $b$ values depend on the aeon following the table below:

Aeon a b
Valefor 20 2
Ifrit 20 2
Ixion 20 2.5
Shiva 20 2
Bahamut 20 2
Anima 20 2
Yojimbo 10 3
Cindy (Magus Sister) 20 2
Sandy (Magus Sister) 20 2.7
Mindy (Magus Sister) 20 2.4