Level

The level of a Monster is a measurement of how strong a Monster current is. Monsters can level up by gaining experience (EXP) after battles or by using Level Badges. These Level Badges can only be used on Monsters that are at least two levels lower than your highest-level Monster. For instance, if your highest-level Monster is at level 22, you can only use Level Badges on Monsters that are level 20 or lower.

When a Monster levels up, its stats increase, and it gains a Skill Point, allowing it to take an additional skill on its Skill Tree. Every ten levels, a new tier is unlocked on the Monster's Skill Tree, and reaching level 40 unlocks Ultimate skills. After gaining a level, a Monster's EXP bar resets to 0.

Level Cap

In Monster Sanctuary, the maximum level is 42. Once a Monster reaches this level, it can still accumulate EXP after battles. However, instead of leveling up, the player is rewarded with a Level Badge 42. These Level Badges can be used on any Monster that has not reached the level cap. Filling the EXP bar resets it to 0, allowing players to obtain an infinite supply of Level Badge 42s at no cost.

Experience

Each Monster gains the same amount of EXP at the end of a battle, regardless if they participated in the battle or not. Only the first six active Monsters in your party will gain EXP. In New Game+, inactive Monsters can gain EXP alongside your active Monsters until they reach their original level. Monsters donated to the Monster Army also accumulate the same EXP for every battle the player faces until they reach the level cap. Defeating higher-level Monsters grants more EXP. The Infinity Arena and Online Arena do not award Monsters any EXP. The table below shows the EXP and total EXP needed to level up on each level.

Current level	EXP needed	Total EXP needed		Current level	EXP needed	Total EXP needed
1	37	37		22	4542	23183
2	46	83		23	5633	28816
3	57	140		24	6985	35801
4	70	210		25	8661	44462
5	117	327		26	10740	55202
6	145	472		27	13318	68520
7	180	652		28	16514	85034
8	223	875		29	20478	105512
9	277	1152		30	25392	130904
10	343	1495		31	31487	162391
11	426	1921		32	39043	201434
12	528	2449		33	48414	249848
13	655	3104		34	60034	309882
14	812	3916		35	74442	384324
15	1007	4923		36	92308	476632
16	1249	6172		37	137354	613986
17	1549	7721		38	170320	784306
18	1921	9642		39	211196	995502
19	2382	12024		40	261883	1257385
20	2954	14978		41	324736	1582121
21	3663	18641		42+	300000	1882121+

Wild Monsters

The level of wild Monsters scales with the number of rooms containing Monster encounters that the player has explored. Upon entering a room with a Monster encounter, the Monsters' levels in that room become fixed. Certain areas have a predefined minimum level set for the Monsters:

• Sun Palace: Level 18
• Ancient Woods (dark tunnels area): Level 20
• Extra encounters at Snowy Peaks: Level 20
• Horizon Beach: Level 21
• Magma Chamber: Level 21
• Mystical Workshop: Level 24
• Blob Burg: Level 25
• Underworld: Level 30
• Forgotten World: Level 30
• Abandoned Tower: Level 35
• Eternity's End: Level 40
• Champion Monsters have varying minimum levels

Do note that the minimum levels above only applies to wild battles. Monsters in Keeper Duels scale normally and do not have a set minimum level, whereas Legendary Keepers have max level Monsters.

An NPC at Horizon Beach can adjust the minimum level of all wild Monsters based on the player's Keeper Rank. This adjustment does not lower the level of wild Monsters; it has no effect on areas with a higher minimum level or on existing Monster encounters that are already above the adjusted minimum level.

Rank	Minimum Level
Keeper Aspirant	3
Keeper Novice	9
Keeper Seeker	12
Keeper Lancer	15
Keeper Ranger	20
Keeper Knight	25
Keeper Champion	29
Keeper Dragoon	33
Keeper Master	42

Hatched Eggs

When hatching a Monster egg, the newly hatched Monster's level is determined by the level of your highest Monster. This feature proves beneficial, reducing the need for extensive grinding to level up your Monsters, particularly those that are underleveled.

• If the highest level Monster is between level 1-3, hatched Monsters will be the same level.
• If the highest level Monster is between level 4-11, hatched Monsters will be 1 level lower.
• If the highest level Monster is between level 12-32, hatched Monsters will be 2 levels lower.
• If the highest level Monster is level 33 or higher, hatched Monsters will be 3 levels lower.