Other than using them in battles or as Exploration team, you can upgrade your Food Souls EXP by using EXP bottles, which are obtainable from Exploration, Story Mission rewards, Normal & Hard Levels, etc. Food Souls max EXP level is corresponding to your account level, and capped by their ascensions. Every level upgrade will also upgrade their ATK, HP and DEF stat. Every skill level also depends on Food Soul level, by dividing their EXP level by 3 and round it up or add 1.
+200 EXP
+500 EXP
+1000 EXP
Ascension Levels and Their Level Cap [ ]
Ascension
Max Level
0
60
1
75
2
90
3
100
4
110
5
120
EXP for Every Level [ ]
Level
EXP Required
Total EXP Spent
2
40
40
3
88
128
4
158
286
5
210
496
6
264
760
7
320
1,080
8
378
1,458
9
438
1,896
10
500
2,396
11
564
2,960
12
630
3,590
13
698
4,288
14
768
5,056
15
840
5,896
16
914
6,810
17
990
7,800
18
1,068
8,868
19
1,148
10,016
20
1,230
11,246
21
1,312
12,558
22
1,394
13,952
23
1,476
15,428
24
1,558
16,986
25
1,640
18,626
26
1,722
20,348
27
1,804
22,152
28
1,984
24,136
29
2,206
26,342
30
2,430
28,772
31
2,656
31,428
32
2,884
34,312
33
3,114
37,426
34
3,346
40,772
35
3,580
44,352
36
3,816
48,168
37
4,054
52,222
38
4,294
56,516
39
4,536
61,052
40
4,780
65,832
41
5,024
70,856
42
5,268
76,124
43
5,512
81,636
44
5,756
87,392
45
6,000
93,392
46
6,244
99,636
47
6,488
106,124
48
6,732
112,856
49
6,976
119,832
50
7,220
127,052
51
7,464
134,516
52
7,708
142,224
53
7,952
150,176
54
8,196
158,372
55
8,440
166,812
56
8,684
175,496
57
9,198
184,694
58
9,680
194,374
59
10,164
204,538
60
10,650
215,188
61
11,136
226,324
62
11,622
237,946
63
12,108
250,054
64
12,594
262,648
65
13,080
275,728
66
13,566
289,294
67
14,052
303,346
68
14,538
317,884
69
15,024
332,908
70
15,510
348,418
71
15,996
364,414
72
16,482
380,896
73
16,968
397,864
74
17,454
415,318
75
17,940
433,258
76
18,426
451,684
Level
EXP Required
Total EXP Spent
77
18,912
470,596
78
19,398
489,994
79
20,132
510,126
80
20,940
531,066
81
21,748
552,814
82
22,556
575,370
83
23,364
598,734
84
24,172
622,906
85
24,980
647,886
86
25,788
673,674
87
26,596
700,270
88
27,404
727,674
89
28,212
755,886
90
29,020
784,906
91
29,828
814,734
92
30,636
845,370
93
31,444
876,814
94
32,252
909,066
95
33,060
942,126
96
33,868
975,994
97
34,676
1,010,670
98
35,484
1,046,154
99
36,292
1,082,446
100
37,100
1,119,546
101
37,908
1,157,454
102
38,716
1,196,170
103
39,524
1,235,694
104
40,332
1,276,026
105
41,140
1,317,166
106
41,948
1,359,114
107
42,756
1,401,870
108
43,564
1,445,434
109
44,372
1,489,806
110
45,180
1,534,986
111
45,988
1,580,974
112
46,796
1,627,770
113
47,604
1,675,374
114
48,412
1,723,786
115
51,140
1,774,926
116
52,824
1,827,750
117
54,510
1,882,260
118
56,198
1,938,458
119
57,888
1,996,346
120
59,580
2,055,926
121
61,272
2,117,198
122
62,964
2,180,162
123
64,656
2,244,818
124
66,348
2,311,166
125
68,040
2,379,206
126
69,732
2,448,938
127
71,424
2,520,362
128
73,116
2,593,478
129
74,808
2,668,286
130
76,500
2,744,786
131
78,192
2,822,978
132
79,884
2,902,862
133
81,576
2,984,438
134
83,268
3,067,706
135
84,960
3,152,666
136
86,652
3,239,318
137
88,344
3,327,662
138
90,036
3,417,698
139
91,728
3,509,426
140
93,420
3,602,846
141
95,112
3,697,958
142
96,804
3,794,762
143
98,496
3,893,258
144
100,188
3,993,446
145
101,880
4,095,326
146
103,572
4,198,898
147
105,264
4,304,162
148
106,956
4,411,118
149
108,648
4,519,766
150
110,340
4,630,106